【題目】 Dry ice is carbon dioxide in frozen form, with a temperature of about -78.3℃. 【1】 Instead, when dry ice melts, it turns into a gas. So when you see dry ice “smoking”, it’s frozen carbon dioxide melting into its gaseous state. Dry ice is a popular matter in science experiments and for a good reason. It creates projects that look cool.

Experiment: Healthy Dry Ice Yogurt Popsicles (冰棍)

This dry ice experiment is a simple project, but it’s certainly wonderful. 【2】 Even kids as young as five will at least appreciate the observations. It should take you about 10 minutes or less to have a frozen treat to enjoy.

Materials

One large block of dry ice

Large spoon or tube-shaped piece of metal

Four Popsicle sticks

One cup of your favorite juice

Tall glass filled with water

Directions

Use the large spoon, or tube-shaped piece of metal to make a Popsicle-shaped hole in the middle of the block of dry ice. You can set the ice on a towel on your counter to do this work. 【3】

Add a Popsicle stick to the middle of the space so that when you pour in the liquid, it will freeze around the Popsicle stick.

【4】 After several minutes, remove the Popsicle from the block of dry ice and dip it into a tall glass of water. Do this to warm up the Popsicle just a bit first. 【5】 You are sure to succeed!

A. Prepare all the necessary materials.

B. Otherwise, it will be too cold to enjoy.

C. It has appeal to a wide range of audiences.

D. Unlike regular ice, dry ice doesn’t melt into a liquid.

E. Keep in mind that it’s okay if it’s not exactly Popsicle-shaped.

F. The number of experiments you can perform using dry ice is endless.

G. Hold the Popsicle stick in place and wait a few minutes for your Popsicle to harden.

【答案】

【1】D

【2】C

【3】E

【4】G

【5】B

【解析】

這是一篇說明文。文章介紹了如何用干冰制作冰棍的實(shí)驗(yàn)。

【1】根據(jù)下文的instead這一提示詞，可知，和常規(guī)的冰不一樣，干冰不會(huì)融化成液態(tài)。而是直接變成氣態(tài)。故選D。

【2】根據(jù)下一句的Even kids as young as five will at least appreciate the observations.甚至五歲的孩子都會(huì)喜歡看。可知，這個(gè)實(shí)驗(yàn)會(huì)廣泛吸引觀眾。故選C。

【3】根據(jù)本段前面的Use the large spoon, or tube-shaped piece of metal to make a Popsicle-shaped hole in the middle of the block of dry ice. You can set the ice on a towel on your counter to do this work.用大勺子或管狀的金屬棒在干冰里挖一個(gè)冰棍狀的洞�？梢栽诟杀旅鎵|個(gè)毛巾，在吧臺(tái)上操作�？芍拔奶峒傲送诙矗�make a Popsicle-shaped hole），其中Popsicle-shaped在E項(xiàng)中復(fù)現(xiàn)，故E. Keep in mind that it's okay if it's not exactly Popsicle-shaped.記住，這個(gè)洞挖得不那么像冰棍也不要緊。最符合語境。故選E。

【4】上文提到在那個(gè)挖出來的洞中間加一根冰棍棒，再倒入果汁。特別提到it will freeze around the Popsicle stick（冰棒周圍會(huì)結(jié)冰。）可知，G. Hold the Popsicle stick in place and wait a few minutes for your Popsicle to harden.接下來就應(yīng)該是固定住冰棍棒，然后等待冰棍慢慢凝固成型。最符合語境。故選G。

【5】根據(jù)前一句Do this to warm up the Popsicle just a bit first.冰棍做好以后要在水里浸泡一會(huì)稍微加熱一下。可知，接下來會(huì)解釋要浸泡加熱的原因。故B. Otherwise, it will be too cold to enjoy.要不然就會(huì)太冰而無法吃了。最符合語境。故選B。

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：

【題目】 In 1953，a mountain climber reported seeing a bar-headed goose soar over the peak of Mount Everest (珠穆朗瑪 ). It was thought impossible. Now researchers who raised 19 of the geese—named for the black stripes on the backs of their heads—have shown the birds really fly so high.

The team trained the youngsters to fly in a large wind tunnel wearing backpacks and face masks full of sensors that recorded their heart rate. blood oxygen levels, temperature, and metabolic rate—how many calories they burned per hour. The researchers simulated(模擬)10w-, medium-, and high-altitude conditions by altering the concentration of oxygen supplied to face masks worn by each goose as it flew in the tunnel.

Birds already have a better heart and lungs than mammals for sustained physical activity. And researchers knew that bar-headed geese have even larger, thinner lungs that let them breathe more deeply and an even bigger heart to pump more oxygen to muscles than other birds.

The wind tunnel experiments showed that when the concentration of oxygen was at its lowest-like the 7% found on top of Mount Everest versus 21% at sea level—the geese's heart rate and frequency of wing beats remained the same even as their metabolic rate dropped. Somehow, the birds managed to cool down their blood-the measured blood temperature droppedso it could take in more oxygen, the researchers report today in eLife. This cooling likely helps compensate for the very thin air, the team says.

Although well trained, the birds were only willing to stay in the air a few minutes-or Iesswhen wearing their backpacks and flying at 6ihigh" altitudes. So it's not clear whether these adaptations alone are what make it possible to fly the 8 hours it takes to climb over Mount Everest. But those few minutes showed these geese really could fly over the top of Mount Everest.

【1】Why did the researchers raise 19 bar-headed geese and train them?

A.To test the flying height and speed of them.

B.To confirm they could fly over Mount Everest.

C.To observe them flying through the wind tunnel.

D.To see how many calories they burned per hour.

【2】What can we learn from the wind tunnel experinent?

A.It was carried out at very high altitude.

B.The geese managed to breathe less when their blood decreased.

C.The geese could live through the lowest concentration of oxygen.

D.It shows the geese could fly at high altitude for long.

【3】What still puzzles scientists about the geese?

A.Whether they have super hearts and lungs.

B.Whether they have muscles pumped more oxygen to.

C.Whether they are willing to wear backpacks and face masks.

D.Whether they can manage to fly 8 hours to climb over Mount Everest.

【4】Where does the text most probably come from?

A.A science fiction.

B.A climbing guide.

C.A travel brochure.

D.A science report.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】

A.She has been having a sad day.

B.She needs to take a day off.

C.She wants to play basketball, too.

D.She has been annoyed by the noise.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】閱讀下面短文，根據(jù)以下提示：1）漢語提示，2）首字母提示，3）語境提示，在每個(gè)空格內(nèi)填入一個(gè)適當(dāng)?shù)挠⒄Z單詞，并將該詞完整地寫在右邊相對(duì)應(yīng)的橫線上。所填單詞要求意義準(zhǔn)確，拼寫正確。

What would you do if you failed? Many people may choose to give 【1】 . However, the surest way to success is to keep your direction and s【2】 to your goal.　On your way to success, you must keep your direction. It is just like a lamp, g【3】 you in darkness and helping you 【4】(克服)difficulties on your way. Otherwise, you will easily get lost or hesitate to go 【5】(向前).Direction means objective, you can get nowhere 【6】 an aim in life. You can try to write your aim on paper and make some p【7】 to achieve it. In this way, you will know 【8】 to arrange your time and to spend time properly. And you should have a【9】(信念)thatyouaresuretosucceedas【10】asyou keepyourdirectionallthetime.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】文中共有10處錯(cuò)誤，每句中最多有三處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。

增加：在缺詞處增加一個(gè)漏字符號(hào)（∧），并在其下面寫出該加的詞。

刪除：把多余的詞用斜線（/）劃掉。

修改：在錯(cuò)誤的詞下畫一條橫線，并在該詞下面寫出修改后的詞。

Nowadays, the great number of people, especially young people, like ordering meals online. It’s not surprised. First, as the pace of modern life is becoming faster and faster, people had less time to cook even one meal for themselves. Second, the development of technology brings us smart phones and new apps, what may lead to the increase in online service. However, we should pay more attention to food. As we all know it, our health is closely related to what we eat. Although the service provides us convenience, we must take the food safety into considerate. Home-made food is cleaner and healthy, but I prefer to cook food at home rather than ordering meals online.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】 Harry is a vehicle called a pod—in other words, something like a car. But Harry has no steering wheel or brake pedal. Harry does not even have a driver. Yet Harry is carrying passengers around London for the next few weeks.

Harry is part of an experiment called GATEway that is testing how people react to driverless vehicles. The name GATEway is short for Greenwich Automated Transport Environment. The experiment aims to help cities prepare for the future of transportation. The GATEway experiment does not test new technology. Instead, it tests the way existing technology can work in society.

The pod operates in an area of London called Greenwich, home of time and navigation museums. Other places where pods will be tested are Coventry, Milton, Keynes and Bristol. The pods run using sensors and a 3D map of the area. A safety operator rides along to take control in case of an emergency.

GATEway is intended to see how pedestrians and cyclists may adapt to driverless vehicles. Harry holds up to four people (three passengers and a safety operator) and can travel at speeds up to 16km/h. It is being tested in Greenwich on pedestrian paths, but not on roads with other vehicles.

If you are in Greenwich during the next few weeks you may see Harry, but you cannot ride in it during the trial. Over 5,000 people applied to be a passenger in Harry but only about 100 were chosen.

You can, however, ride in a similar pod at Heathrow Airport in London. The Heathrow pods run on tracks so they are not being tested with pedestrians, cyclists or other drivers. If the trials are successful, the first pods could be operational on the roads of the UK in 2020.

【1】What’s the purpose of the GATEway?

A.To settle traffic problems in cities.

B.To test a new transportation technology.

C.To prepare cities for future transportation.

D.To draw people’s interest in transportation.

【2】What will happen if Harry meets with dangerous situation?

A.The passengers will help.

B.It will deal with it by itself.

C.An accident will take place.

D.A human driver will take it over.

【3】Why is Harry running on the sidewalk?

A.To test the response of people walking or on a bike.

B.To avoid disturbing other vehicles on the street.

C.To prevent it from running at a high speed.

D.To watch pedestrians and cyclists go safely.

【4】What’s people’s attitude towards Harry?

A.Fearful.B.Positive.

C.Doubtful.D.Grateful.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】My brother bought a telescope, ______ he could study the star in the night sky.

A.of whichB.through whichC.in whichD.on which

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】 Shakespeare’s Globe Exhibition & Tour is a unique international resource to explore Shakespeare’s work. Open all year round, it gives you an opportunity to learn more about the world’s most famous playwright, and helps you seek to further the experience and international understanding of him.

Opening Hours

Theater Tours: Monday - Sunday 9:30 a.m. - 5 p.m. Exhibition: Monday - Sunday 9 a.m. - 5 p.m.

Groups of 15 people or more are required to pre-book their visit, and each group will have its own tour guide for free. To make a reservation, please fill in a Group Request Form and email it to us.

Last admission is 30 minutes prior to closing time.

Exhibition and Tour Prices

Adult: ￡15.00 Senior (60 ): ￡13.50

Student (with valid ID): ￡11.50 Children (5-15): ￡8.00 Complimentary: every 16th person free

Getting here

Shakespeare’s Globe 21 New Globe Walk, London SE1 9DT, U.K.

We have currently improved security, with all bags being checked. Please arrive in good time, and do not bring any large bags.

Visitors are advised to arrive by public transport or by taxi. There is a car park on Thames Exchange on the north side of Southwark Bridge. Black cabs may be found all year round on Southwark Bridge. It may also be possible to pick one up from outside the entrance hall on New Globe Walk.

Where to eat

Swan at Shakespeare’s Globe serves modern British seasonal food for dinner, afternoon tea or drinks in our beautiful bar and restaurant set over two floors.

Swan Restaurant

Monday-Friday: 12 p.m. - 2:30 p.m. & 6 p.m. - 10:30 p.m.

Saturday: 12 p.m. - 3:30 p.m. & 6 p.m. - 10:30 p.m.

Sunday: 12 p.m. - 9 p.m.

【1】Visitors can attend the exhibition at _______.

A.8:35 a.m. on Monday

B.2:35 p.m. on Friday

C.5:35 p.m. on Saturday

D.4:35 p.m. on Sunday

【2】According to the article, which of the following statements is true?

A.Visitors are required to deposit their bags before entering the theater.

B.Visitors can park on the south side of Southwark Bridge.

C.Taxi services are accessible near Southwark Bridge.

D.It’s more convenient to drive there than taking public transport.

【3】According to the article, what can we learn about Swan Restaurant?

A.It has a lunch break of four hours on weekdays.

B.Afternoon tea is not served on weekends.

C.It serves light meals and drinks every day.

D.It mainly serves local food varying with the seasons.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】假定你是攀枝花中學(xué)學(xué)生李華。有一批美國高中學(xué)生到你校參觀，學(xué)校安排你負(fù)責(zé)接待。請(qǐng)你用英語向他們簡單介紹你校的基本情況，主要內(nèi)容如下：

1. 自我介紹；

2. 學(xué)校歷史及教學(xué)設(shè)施；

3. 學(xué)校的課程安排；

4. 課外活動(dòng)（如社團(tuán)活動(dòng)、體育運(yùn)動(dòng)等）。

注意： 1. 詞數(shù)100左右，文章開頭已給出，不計(jì)入總詞數(shù)；

2. 可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。

參考詞匯：社團(tuán) — club

Good morning, dear friends,

______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

查看答案和解析>>

同步練習(xí)冊(cè)答案