相關(guān)習題
 0  136095  136103  136109  136113  136119  136121  136125  136131  136133  136139  136145  136149  136151  136155  136161  136163  136169  136173  136175  136179  136181  136185  136187  136189  136190  136191  136193  136194  136195  136197  136199  136203  136205  136209  136211  136215  136221  136223  136229  136233  136235  136239  136245  136251  136253  136259  136263  136265  136271  136275  136281  136289  151629 

科目: 來源: 題型:閱讀理解

12.Situated at the gate to the Tianjin Children's Welfare Institute,a government-run orphanage,the baby hatch---also known as a babies'safety island---allows desperate parents to leave unwanted newborns,press an alarm button,and depart anonymously.After a delay of about five minutes,someone from the institute will arrive to get the child.
But facilities(設(shè)施) such as this have been under fire recently.While some people have approved of the idea,saying it protects the lives of unwanted children; critics argue that it encourages the immoral to abandon such babies,which is illegal in China.
It's difficult to obtain statistics about the number of abandoned children in China,but the 2010 China Child Welfare Policy Report,released by the China Philanthropy Research Institute,estimated that 100,000 babies are abandoned every year,most of them with disabilities and illnesses.In July,2013,when the Ministry of Civil Affairs launched a pilot project to set up baby hatches across China,Tianjin was one of the first cities to launch a facility and there were 24 baby hatches in 10 provinces,municipalities and autonomous regions(地區(qū)).A further 18 regions are preparing to open facilities by the end of this year,according to the China Center for Children's Welfare and Adoption.
"The baby hatch guards an unwanted baby from harm and increases its chances of survival,"said Xu Shuming,who is in charge of the reception of unwanted children and their following adoption at the Tianjin Children's Welfare Institute,is also in favor of the project."Before the baby hatch came into use,the babies we took in were usually brought by the police.They had been found at bus stations,public rest rooms,or parks; it could be anywhere.One baby we received last year was almost frozen to death,"she said."For our part,we hope parents will leave more information with their unwanted babies,such as medical records so that we can understand the real situation,avoid repeated medical checkups,and save time,"Xu said.
36.A baby hatch is a place whereB.
A.parents can leave their baby for some time               
B.unwanted newborns can be left.
C.unhealthy babies can be treated free of charge
D.the chances of babies'survival can be increased
37.The underlined phrase"under fire"in Paragraph 2 is closest in meaning toB.
A.ignored       B.a(chǎn)ttacked           C.supported     D.discussed
38.Why some people are against the baby hatch?A
A.Because it encourages parents to abandon the unwanted babies.
B.Because it is illegal to abandon a baby in China.
C.Because it wastes an amount of money.
D.Because it protects unwanted babies.
39.According to passage,we knowC
A.All the people approve of the baby hatch.
B.It's easy to figure out exactly the number of abandoned children in China
C.Most of the unwanted babies are in poor condition
D.There will be 42 baby hatches in China at the end of this year
40.We can infer from the passageD.
A.Parents usually leave little information in case that they are found out.
B.Less and less unwanted babies are abandoned in China
C.The police used to take charge of attending abandoned babies
D.The information left by parents may be of great help to protect unwanted babies.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

11.Produced by Hunan Satellite TV,Where Are We Going,Dad?invites five male celebrities (名人)from different fields and their children to spend quality time together in new environments while accomplishing various survival tasks.
Since it first aired in January,2013,Where Are We Going,Dad?has been sweeping the whole nation and has become China's most popular show,averaging more than 600 million viewers each week and 640 million downloads online.Even the China Daily,the official mouthpiece of the Chinese government praised its success,"The deep affection on display in the show is heart-warming."But what accounts for the show's popularity?
Part of the appeal is the chance to peek(窺探) into the lives of popular Chinese celebrities and their children.Audiences are delighted to watch the failed attempts of celebrity dads making dinner,combing hair,and disciplining children.At the same time,the cute kids themselves and their authentic and entertaining behaviors are very impressive and attractive.
"Another reason for the success of the show lies in the fact that it is a reexamination of the father's role in traditional Chinese culture,"said Xie Dikui,general director of the show.In a society still influenced by the concept that"men rule outside and women inside.",many Chinese fathers are poor at expressing their feelings toward their children.Usually,they appear strict and distant.But on the show,we see fathers are much gentler on their kids and more involved in their upbringing.This show raises an important question for modern Chinese society-what is the role of fathers in today's China?
A fascinating part of the show is that you can see many parenting styles.The five fathers on the show all have very diverse parenting styles,which is great because it shows people there isn't just one way to raise a child.But Chinese parents increasingly realize that discussing and respecting their children's choices may be a more appropriate way to prepare them for modern society.Meanwhile,the show can remind adults of their own childhood and the love of father.For those parents,they will rethink their own responsibility as parents and understand their kids better.
26.The second paragraph is mainly aboutA
A.the show's success                 
B.the reason for the show's success
C.the China Daily's praise                  
D.deep affection between fathers and their kids
27.The chief function of"But what accounts for the show's popularity?"(in Paragraph 2)isB
A.to sum up the main idea of the paragraph         
B.to introduce a new topic
C.to arouse reader's interest                  
D.to express strong feelings
28.What can be inferred from the fourth paragraph?B
A.Traditionally,children are left to be brought up by mothers alone in China.
B.The role of fathers is changing in China.
C.Modern Chinese fathers wonder how to treat their children.
D.More and more mothers go out to work.
29.Which of the following is NOT the reason for the show's success?D
A.People are curious about celebrities'life and their kids.
B.The show makes people reconsider father's role in today's China.
C.The show displays various parenting styles.
D.The audience think highly of the celebrities'parenting styles on the show.
30.What is the best title of the passage?B
A.The great success of Where Are We Going,Dad?
B.Why is Where Are We Going,Dad so popular?
C.What is the role of fathers in today's China?
D.Various parenting styles in China.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

10.A dog-lover has invented a high-tech way of feeding his pet by Twitter(推特,流行社交網(wǎng)絡(luò)).Computer expert Nat Morris,30,has designed a system to give his pet a"tweet treat"by sending him a Twitter message.
His dog Toby gets some delicious dog biscuits from a computer-controlled food machine whenever Nat sends a message to"@feedtoby".
Nat often works away from home and isn't always able to feed Toby by hand.But his new invention  allows Nat to feed his dog from anywhere in the world.
Nat said,"Toby absolutely loves it.At first he didn't know what was going on.Now he sits underneath the machine,wagging his tail and waiting for the treats to drop."
Nat fills the food machine with small pieces of dog biscuits,but not too many in case four-year-old Toby gets too many messages.And Nat has even equipped his house with an online camera so he can see Toby enjoying the food at his home.
But one problem is that friends and family have been so amazed with the"Tweet treat"machine that.they have starting to send tweets to Toby too.So Nat has had to restrict feeding time to make sure Toby doesn't turn into Tubby.
"People have been sending him food at all hours of the day,so I had to limit it to between 9 a.m.a(chǎn)nd 9 p.m..I'm thinking of doing an updated one which measures his weight before he is fed,just to make sure he's not putting on too much puppy fat,"explained Nat.
How Nat's Twitter Feeder Works:
When a message is sent to@feedtoby it is received by a mini-computer that is linked to the food machine.
When the mini-computer receives the message,a bell rings and Toby comes running over and sits in front of the feeding machine.Next the machine's motor pulls open a trap door which releases a serving of food.
The doggy biscuits then drops into Toby's food bowl.Finally a digital camera takes a photo of him and sends it back to Nat on Twitter-so he knows Toby has been fed.
 
31.Nat has invented a high-tech way to feed his dog because heC.
A.wants his friends to feed Tody                                 
B.has very strong computing skills
C.is often too busy to feed his dog    
D.doesn't like to feed Tody by hand
32.Why has Nat decided to limit the feeding machine's opening time?A
A.He doesn't want Toby to get too fat.
B.He fears the machine will run out of food.
C.He wants hid friends to stop feeding Toby.
D.He doesn't want Toby to be woken up at night.
33.It can be learned from the passage that TobyB
A.sits beneath his feeder all day long
B.is now used to being fed by machine
C.doesn't know what happens to the feeder
D.no longer receives tweets from Nat's friends
34.Which of the following shows the correct order of how the Twitter Feeder works?
C
a.The bell goes off.
b.A message is sent to@feedtoby.
c.The mini-computer gets the message.
d.The digital camera takes a photo of Toby and sends it to Nat.
e.The motor starts to work and opens the door to release dog food.
A.a(chǎn),b,c,e,d    B.b,c,e,a,d       C.b,c,a,e,d       D.c,b,a,d,e
35.In which section of the newspaper would you most probably find this passage?A
A.Technology   B.Health   C.Environment   D.Style.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

9.BERLIN-With the crisis in Japan raising fears about nuclear power,Germany and Switzerland said on Monday that they would reassess(重新評估) the safety of their own reactors.
Doris Leuthard,the Swiss energy minister,said Switzerland would put off plans to build nuclear plants.She said no new ones would be permitted until experts had reviewed safety standards.
Germany will put off"the recently decided extension of the running time of Cerman nuclear plants,"Chancellor Angela Merkel told reporters."This moratorium (延緩) will run for three months and it will allow for a thorough exanunation of the safety standards of the country's 17 nuclear power plants.
The European Union called for a meeting on Tuesday of nuclear safety authorities to assess Europe's preparedness.
Germany's foreign minister,Cuido Westerwelle,called for a new risk analysis of the counitry'snuclear plants,particularly regarding their cooling systems.He is the leader of the Free Democratic Party,which strongly supports nuclear power.
A previous government,led by the Social Democrats,passed a law in 2001 to close all the country's nuclear plants by 2021.But Mrs.Merkel's government changed that decision last year to extend the lives of the plants by an average of 12 years.
In Switzerland,Doris Leuthard said she had already asked to analyze the exact cause of the problems in Japan and draw up new or tougher safety standards"particularly in terms of seismic(地震的 )safety and cooling."
In Russia,the Prime Minister said his govemment would"draw conclusions from what's going
on in Japan."
72.Where can you most likely read this passage?D
A.In a diary
B.In a magazine
C.In a science report
D.ln a newspaper.
73.How will Germany react to Japan's nuclear crisis?D
A.Germany will change the decision made last year.
B.Germany will close all the country's nuclear plants,
C.Germany will hold a meeting of nuclear safety authorities.
D.Germany will delay the extension of nuclear plants running time..
74.The author mentions all the following EXCEPTB
A.Russia will try to Ieam something from the nuclear power crisis in Japan.
B.The Social Democrats in Germany shares the same view with the Free Democratic Party.
C.The moratorium in Cermany will give time to examine the nuclear plants safety standards.
D.Switzerland will not build new nuclear plants unless they meet the experts'safety standards.
75.What is the best title of the passage?A
A.Nuclear Plants in Europe Are Delayed
B.Europe Is against Building Nuclear Plants
C.Opinions on Nuclear Power Are Opposite.
D.Watch Out for the Danger of Nuclear Power.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

8.Firefighters had largely tamed a tower of flame and smoke that covered the sun and drove thousands from their homes in the foothill suburbs northeast of Los Angeles,but a week of dangerously windy wildfire conditions and a year of historic dryness meant that this fire and predictable ones to come remained a major threat.
By nightfall Thursday,the wildfire that swept through about 2 1/2 square miles of brush in the San Gabriel Mountains and destroyed five homes early in the day had its progress stopped and was 30 percent contained.More than 700 firefighters were on the scene,along with 70 engines and a fleet of helicopters and air tankers dropping water and retardant(阻止物).
But the National Weather Service said a red-flag warning of extreme fire danger in effect much of the week would remain in place until Friday evening because of low humidity and the chance of the region's infamous Santa Ana winds bursting to 30 mph in the foothills and valleys.
Some 3,700 people from Glendora and Azusa evacuated at the height of the fire.Glendora residents were allowed to return home Thursday evening,but homes in Azusa remained under evacuation orders.It wasn't clear how many remained empty.
Fire engines would stay in all the endangered neighborhoods through the night and helicopters were available to fly after dark if it became necessary.Nighttime bursts brought a few flame-ups,but they remained within fire lines.
Two firefighters had minor injuries and a woman trying to fight the fire near her home suffered a minor burn.Seventeen structures were damaged,including homes,garages,barns and other buildings.At least 10 renters were left homeless when the fire destroyed rental units on the historic grounds of a retreat that once was the summer land of the Singer sewing machine family.Statues of Jesus and Mary stood unharmed near the blackened ruins.However,the main,1920s house was spared.
Three men in their 20s,including a homeless man,were arrested on suspicion of irresponsibly starting the fire by tossing paper into a campfire in the Angeles National Forest,just north of Glendora.They said they were trying to keep warm and the wildfire appears to have been an accident.They could face state or federal charges.
61.What's the purpose of the first paragraph?C
A.To introduce the topic
B.To arouse readers'interest.
C.To summarize the main idea
D.To share the writer's opinion
62.What do we know about the fire?D
A.It lasted a week
B.It started on a Thursday.
C.It grew wilder at night
D.It flamed up high at first
63.What led to the outbreak of the fire?D
A.Low humidity
B.Windy fire conditions.
C.No timely warning
D.Careless campers.
64.The underlined word"evacuated"in Paragraph 4 probably meansC.
A.swept                      
B.burst                                        
C.fled                        
D.endangered
65.The three young men were arrested becauseB.
A.they were homeless                                                    
B.they were to blame for the fire
C.they wanted to keep warm by the fire                   
D.they started the fire deliberately.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

7.First direct coal liquefaction(煤液化) line produces
(Xinhua)
    HOHHOT-China's first direct coal-to-oil project,operated by the country's leading coal producer,Shenhua Group,produced 866,000 tons of oil products last year.
    The direct coal liquefaction line is located in Ejin Horo Banner(伊金霍洛旗),Ordos city,North China's Inner Mongolia autonomous region.It produces 3,000 tons of oil products by using nearly 10,000 tons of coal per day,said Shenhua Coal Liquefaction and Chemical  Co.,Ltd.
    With an investment of 12.6 billion yuan ($2.06 billion),Shenhua Group began construction of the project in 2004,using self-developed technologies.
    The project began trial production at the end of 2009 with a designed annual capacity of 1.08 million tons of diesel(柴油),naphtha(粗汽油)and liquefied petroleum gas(液化石油氣).
    Proven coal reserves(已探明的蘊藏量)around Ordos are estimated at 160 billion tons,or 11.4 percent of the country's total coal reserves.
    As part of its clean energy strategy,China has begun a number of direct or indirect coal liquefaction and coal gasification projects in Inner Mongolia,Shaanxi,Ningxia,Xinjiang and Liaoning in the past three years.
25.What's mainly talked about in the passage?C
A.The way to change coal to oil.
B.China's leading coal producer,Shenhua Group.
C.China's first direct coal-to-oil project.
D.The proven coal reserves around Ordos.
26.Which of the following is TRUE according to the passage?D
A.Shenhua Group began construction of the project in 2009.
B.The project produces 866,000 tons of oil products every year.
C.It produces 3,000 tons of oil products with nearly 100,000 tons of coal per day.
D.The project can produce 1.08 million tons of diesel,naphtha and liquefied petroleum gas every year according to design.
27.We can most probably see this passage in aB.
A.science magazine                                
B.newspaper
C.billboard(廣告牌)                           
D.story book.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

6.Last month,James Connolly,a junior at the University of Massachusetts,stood in front of a local police station wearing a loose garment as punishment.His crime?He was charged with underage drinking,illegal possession of alcohol and very big noise while holding a party.
    This shaming punishment has increased in the US in recent years,mostly decided by local judges for less-serious crimes such as drunk driving and theft.They believe shame is the best small crime punishment.For example,in Tennessee,Judge James McKenzie has made a shoplifter stand outside Wal-Mart with signs that read,"I'm a thief put here by order of Judge McKenzie."
    Some experts think alternative punishments like community service and fines don't convey moral condemnation (譴責) of the criminal because they aren't shameful enough.Shaming punishments are sometimes called Scarlet Letter punishments.The name comes from US author Nathaniel Hawthorne's 1850 novel,The Scarlet Letter.In this novel,a woman is forced to wear a scarlet ( red)"A"on her clothes as punishment for her adultery.
   Supporters of shaming punishment argue that public shaming is a good way of expressing community values.Some judges say shamed offenders seldom repeat their crimes.Others aren't so sure."There is little evidence to suggest that shaming punishment are successful in preventing people from committing special crimes.And a shamed criminal may face a hard battle to regain reputation in society.So a shaming punishment may force the offender into more crime to support himself."
29.James Connolly was punished becauseC.
A.he wore a loose garment in front of a local police station
B.he drunk too much and caused an accident
C.he broke the law of alcohol consumption and held a noisy party
D.he stole things from a supermarket
30.In early American societies,offendersD.
A.wore a scarlet"A"on their clothes as shaming punishment
B.would never gain respect from others
C.didn't receive any moral condemnation
D.had the chance of being accepted by the societies again
31.We can infer from the passage thatB.
A.shaming criminals publicly is a good way of expressing community values
B.shaming punishment has a long history in the US
C.shaming punishment can always have good results
D.community service and fines don't convey moral condemnation of criminals
32.What is the best title of the passages?A
A.Doubtful Punishment
B.Successful Punishment
C.The Increasing Punishment in the US
D.The Result of Shaming Punishment in the US.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

5.Millions of sports lovers are sill thinking about one thing----the Winter Olympics in Sochi Russia.close to 2900 men and women competed in the 2014 Winter Games about a month ago.
The Olympics brought a lot of attention to Sochi,a city on the black Sea,which is a popular area for vacation travelers.The area is known for its mild winters,with warm to summer.
At least 50 billion was spent on the 2014 Winter Games,making it the costliest Olympics in history.Seven billion dollars was spent on the 2010 Winter Games in Vancouver,Canada.Olympic officials chose Sochi to host the 2014 games almost seven years ago,At that time,Russian President Vladimir Putin said the games would cost about   13 billion.Yet times his estimate.So where did all the money go?
    Some observers say the high cost is partly the result of security measures.Brian Jenkins,a terrorism expert from the RAND Corporation,gave the following explanation.'There were anywhere between 70,000 and 100,000 policemen and military troops deployed around the city.
    The main threat came from separatist and Islamist groups from the North Caucasus,especially from Chechnya and Dagestan.One group claimed responsibility for two suicide bombings in Volgograd last December.The attacks killed more than 30 people.The city is only about 600 kilometers away from Sochi.
    Bruce Hoffman is a terrorism export from Georgetown University in Washington DC.He says the increased security made Sochi a difficult target for terrorists.
    It is thought that the terrorists'intention was to make life difficult for the Russians and to create some sort of incident that would take away the enjoyment.
The last Olympians from around the world on Russian soil was in 1980.That was a year after Soviet troops invaded Afghanistan.More than sixty countries didn't take part in the Moscow Summer Games to show their anger.
25.According to the passage,why did the Sochi Winter Olympics cost so much?C
A.Because it was held at an area popular for vacation travelers.
B.Becauae the Russian government wanted to make it the best ever held.
C.Because security measures at Sochi were stricter than before.
D.Because the original plan was made 7 years before.
26.It can be known from the passage that Bruce Hoffman wasA       
A.a(chǎn) terrorism expert from the USA
B.the writer who wrote this article
C.a(chǎn)n athlete who competed in Sochi
D.a(chǎn) terrorism expert from RAND Corporation
27.Which of the following is false?B
A.Sochi Olympics cost about 4 times as estimated.
B.Next winter Olympics will be held in Vancouver.
C.Many countries refused.to attend the 1980 Olympics.
D.Security is often a problem in international sport games.
28.The terrorists might have attacked Sochi Olympics becauseA       
A.they wanted to make trouble for the Russians
B.they thought Russia shouldn't spend so much on sport
C.they thought Putin was not a nice president
D.they were not interested in winter sports.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

4.Europe on Thursday launched the first satellite of its Copernicus Earth observation project that will supply valuable images in the event of natural disasters or even a plane crash.
     The Sentinel-la satellite,which was sent into Earth's orbit from Europe's spaceport in French Guiana9 will be used to monitor sea ice,oil spills and land use and to respond to emergencies such as floods and earthquakes.
The Copernicus proiect,for which the European Union and the-European Space Agency (ESA) have committed funding of around 8.4 billion euros (_$_11.5 billion) until 2020,is described by the _ESA as the most ambitious earth observation program  to date.
"The big step forward is that we can now cover every place on Earth every three to six days,"Volker Liebig,director of ESA's Earth Observation program,said ahead of the launch."If you want to use images for disaster management support or to find a plane,then you want the images to be as fresh as possible."But he cautioned you would first need to know roughly where a plane had crashed,which is not the case with the missing Malaysian Airlines jet.
    Copernicus also offers new business opportunities.Images can be downloaded free of charge,meaning companies can then use them to help deliver data to farmers on soil conditions or pest infestation,help oil companies decide where to drill new wells or make it easier for insurers to assess the risk of costly floods and fires.
     Sentinel-la,which will operate with a second satellite,Sentinel-1b,to be launched next year,has high-tech instrurnents that will allow it to record radar images of Earth's surface,even when the skies are cloudy or dark.As part of the Copernicus program,there will be 17 launches over the next decade.
61.For what purpose was the Sentinel-la satellite sent up into space?A
A.To improve observation of the earth.
B.To search for some missing planes.
C.To download free valuable images.
D.To predict floods and earthquakes.
62.What do we know about Copernicus Earth observation project,C?
A.It can cover every place on Earth at the same time.
B.It makes a profit by offering downloaded images.
C.It is financed by the European Union and ESA.
D:It has put two satellites into Earth's orbit successfully.
63.According to Volker Liebig,the Sentine-la satelliteB.
A.can locate the missing Malaysian Airlines jet
B.has advanced but limited functions
C.may cause some safety problems
D.doesn't work on cloudy days or at night
64.How does the Copernicus project benefit farmers?A
A.By supplying data on soil conditions.
B.By calculating the loss of costly floods.
C.By drilling oil wells in proper places.
D.By controlling the risk of potential fires.
65.What does the last paragraph mainly tell us about the Sentinel-1a satellite?D
A.Its operation
B.Its appearance
C.Its instruments
D.Its future.

查看答案和解析>>

科目: 來源: 題型:閱讀理解

3.The German city of Hamburg has announced plans to become car-free within the next two decades.It is an ambitious idea,but city officials obviously feel that the personal motorcar does not fulfill a function that walking,biking and taking public transport cannot.The goal of Hamburg's project is to replace roads with a green network,which will allow people to navigate through the city without the use of cars.
    Banishingthe car from urban areas is becoming a common trend in many European cities.London imposes a"congestion charge"on private vehicles entering the city centre during rush hours.Copenhagen is building bicycle superhighways radiating out from the city centre.These developments combined may make worrying reading for driving enthusiasts.Is the time of the personal car over?
   In the century since the Ford Model T was introduced in 1908,global vehicle numbers have swollen to well over a billion.But according to recent research,the growth may have stopped.
    According to Professor Michael Sivak,at the University of Michigan,"motorization"in the US might have reached a peak in 2008,and that the figures have been on the decline since.
"New York,Washington,Boston,Philadelphia,each have more than thirty percent of households without a light duty vehicle,"says Sivak.In fact,the figures show that fifty-six percent of households in New York (which top the list) don't have a car."I think that will be surprising to most people.It was surprising to me,and I am in the business."
   Sivak thinks a number of factors could be contributing to the trend,including workingfrom home and the movement of populations back to city centers.In China,Beijing and Shanghai are looking at plans to limit the number of new vehicles being registered to control prouth.It's a movement more cities are looking towards,particularly in the US.
56.Why does Hamburg launch the"car-free"program?A
A.To build a greener environment.
B.To fix a worldwide road network.
C.To call on people to take exercise.
D.To replace the public transport.
57.The underlined word"banishing"in Paragraph 2 can best be replaced by"C"
A.putting out                           
B.giving away
C.driving away                        
D.setting out
58.Professor Michael Sivak uses the examples in Paragraph 5D
A.to prove the number of cars has been increasing sharply
B.to persuade American people to give up their way of life
C.to introduce to the readers a new trend in buying cars
D.to show many Americas have already abandoned cars
59.What does Michael Sivak think of the result of his research?B
A.Terrifying
B Amazing
C.Exciting       
D.Disappointing.
60.What can be learned from the last paragraph?C
A.Most people like to work in the countryside.
B.It is only big cities that are taking action.
C.Many factors contribute to the trend.
D.Effective rules have come into effect.

查看答案和解析>>

同步練習冊答案