D
Some people may be born happy, while others are genetically negative, scientists have suggested in a study published late February in a British journal.
Earlier research had already established that the gene known as 5-HTTLPR plays a key role in determining how the neurotransmitter (神經(jīng)傳遞素) serotonin works within the brain. Serotonin, a hormone (荷爾蒙), passes chemical messages between nerve cells. It has been closely linked to mood. Several anti-depressant (抗抑郁) drugs regulate serotonin levels.
Scientists had also identified three variants (變體) of the gene. Two so-called “short” variants were linked to a higher risk of depression and suicide (自殺) attempts. Unlike the two “short” variants, the “l(fā)ong” variant of 5-HTTLPR showed a clear dislike of negative images, such as fierce animals, and a clear liking for positive ones, such as flowers.
Researchers from the University of Essex in Britain showed participants a series of images, which were divided into three kinds: negative ones aimed at inspiring fear or stress such as a snake or person about to commit suicide, pleasant ones and neutral (中性的) ones.
The participants who had the long variant of the 5-HTTLPR gene “showed a clear dislike of negative material alongside a careful attention for positive material,” the researchers found. They paid close attention to the pretty pictures, and ignored the frightening ones. On the other hand, the short variant groups had the opposite reaction.
In January, the Australian government organized “happiness workshops”, teaching government staff how to be happy. The department that held the “happiness workshops” said unhappy staff weren’t productive staff.
Australian political opposition parties have argued that the “happiness workshops” are probably a waste of money and couldn’t increase productivity as intended. However, whether the workshop will have a happy or disappointing result, we will have to wait and see.
71. Various kinds of images were shown to the participants to        .
A. draw their attention
B. cater to their different tastes
C. find out about their reactions
D. teach them to improve their artistic appreciation
72. The “short” variants of 5-HTTLPR differ from the “l(fā)ong” variants of 5-HTTLPR in that_____.
A. the former is connected with positive mood while the latter negative
B. the former is connected with negative mood while the latter positive
C. the former has a greater effect on one’s mood than the latter
D. the latter has a greater effect on one’s mood than the former
73. Which of the following statements is true about “happiness workshops”?
A. Most people believe that they are a waste of money.
B. They will be beneficial in the long run.
C. The purpose of “happiness workshops” is to teach all Australians to be happy.
D. They are organized in the belief that happy staff can work more efficiently.
74. It can be learned from the article that        .
A. drugs can be used to control people’s serotonin levels
B. happiness is more important than sadness
C. nothing can affect our mood
D. people with the short variant of 5-HTTLPR prefer a flower to a snake
75. The article is mainly about        .
A. the reason for the foundation of “happiness workshops”
B. the link between people’s mood and their gene
C. the study on people’s likes and dislikes
D. the differences in people’s attitude towards life

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：

Annealing

Annealing is a way of making metal softer by heating it and then letting it cool very slowly, if metal is heated and then cooled very quickly, for example by dipping(浸) it in water, it will be very hard but also very brittle(脆)—that is, it will break easily. Metal that has been annealed is soft but does not breaks as easily. It is possible to make metal as hard or as soft as is wished, by annealing it. The metal is heated, and allowed to cool slowly for a certain length of time. The longer the heated metal takes to cool slowly, the softer it becomes. Annealing can also be used on other material, such as glass.

1. Annealing can make metal ____

　　A. hard and tough(韌)　B. hard but brittle　　C. soft but tough　　D. soft and brittle

2. Why do people put hot metal in water?

　　A. To make it hard.　　B. To make it soft.　C. To make it cool.　D. To make it brittle

3. In annealing, the required hardness of a metal depends on 　______

　　A. the quantity of water used　B. the temperature of the metal

　　C. the softness of the metal　  D. the timing of the operation

4. As suggested by the text, how can glass be made less brittle?

　　A. It can be heated and then cooled quickly.

　　B. It can be cooled and then heated slowly.

　　C. It can be heated and then cooled slowly.

D. It can be cooled and then heated quickly.

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

完形填空（共20小題；每小題1.5分，滿分30分）

閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng)（A、B、C和D）中，選出可以填入空白處的最佳選項(xiàng)，并在答題卡上將該項(xiàng)涂黑。

Driving to a store after a busy day at work, I saw a man standing near the store holding a sign that said, “will work for food.” I knew at that moment that I was going into the store and   36  him something to eat.

As I   37  the car park, I saw in my car mirror a lady come out from a hairdresser’s and  38   the man. I thought she must be going to give him some  39  or something to help him out. In the store I was   40  to get the things I needed and also the chicken dinner and a soda that I wanted to give the man outside. I hurried out to my car and   41  that I was going to be able to hopefully help this man.

When I drove out of the car park, I couldn’t see the  42  . As I turned the corner I saw the man sitting in a  43  area away from the hairdresser’s and still  44  up the sign. I immediately  45  over and gave the man the dinner and soda and said“  46  this will get you through today.” He looked at me and said “Thank you so much！”As I got back into my car, I looked in the  47  and saw the man swallowing the dinner as if he hadn’t eaten for days.

I was so  48  that I was able to help him and at the same time I was so sad that the woman from the hairdresser’s,   49  ,had asked the man to   50  from her shop. It’s sad to say that  51   I live in a small city where homeless is not as  52  as in larger cities, people are uncomfortable with these people in  53  . All they need to do is lend a helping hand  54   and it could make a huge  55   in their lives.

A. cook            B. buy              C. pay              D. serve

A. turned into        B. got over         C. called at            D. pointed out

A. interview       B. comfort          C. blame                D. approach

A. example        B. space                C. money                D. comfort

A. preparing      B. hurrying         C. hesitating           D. planning

A. explained       B. wondered         C. agreed               D. felt

A. man            B. food             C. lady                 D. sign

A. different      B. strange          C. famous           D. comfortable.

A. making          B. holding          C. taking               D. building

A. turned          B. thought          C. pulled               D. looked

A. Hopefully      B. Finally          C. Luckily          D. Naturally

A. store          B. mirror               C. square               D. crowd

A. popular            B. anxious          C. pleased          D. patient

A. immediately    B. obviously            C. carefully            D. nervously

A. stop           B. suffer               C. move             D. change

A. whether         B. because          C. though               D. unless

A. poor           B. visible              C. selfish             D. happy

A. danger          B. action               C. need             D. moment

A. at times            B. at the time          C. at one time          D. at a time

A. difference     B. mistake          C. decision         D. living

查看答案和解析>>

科目：高中英語 來源：安徽省合肥潤安公學(xué)2009-2010學(xué)年度高一第二學(xué)期期中考試 題型：閱讀理解


D
Some people think that as more and more people have televisions in their homes, fewer and fewer people will buy books and newspapers. Why read an article in the newspaper, when the TV news can bring you the information in a few minutes and with pictures? Why read the life story of a famous man, when a short television program can tell you all that you want to know?
Television has not killed reading, however. Today, newspapers sell in very large numbers. And books of every kind are sold more than ever before. Books are still a cheap way to get information and enjoyment. Although some books with hard covers are expensive, many books are printed today as paperbacks (平裝本), which are quite cheap. A paperback collection of short stories, for example, is always cheaper than an evening at the cinema or the theater, and you can keep a book for ever and read it many times.
Books are a wonderful provider of knowledge and pleasure and some types of books should be in every home. Every home should have a good dictionary. A good encyclopedia (百科全書), though expensive, is usefull, too, because you can find information on any subject. Besides, you can have such books as history books, science textbooks, cookbooks, and collections of stories and peoms. Then from time to time you can take a book of peoms off your shelves and read the thoughts and feelings of your favorite poets.
67. It can be inferred from the passage that _________.
A. TV programs are a chief provider of knowledge.
B. cinemas are the best choice in getting information.
C. reading is a cheap way of learning and having fun.
D. newspapers are an expensive way to enjoy oneself.
68. What does the sentence “Television has not killed reading, however” underlined in the second paragraph suggest?
A. People only need reading, though.               B. Reading is still necessary today.
C. Reading is more fun than television     D. Watching television doesn’t help reading.
69. Which of the following is mainly discussed in the last paragraph?
A. Types of books                                 B. Kinds of dictionaries.
C. Lists of history books                       D. Collections of stories and poems
70. What can we learn from the passage?
A. Fewer and fewer people will buy books.          
B. A good dictionary should be kept in every home.
C. Books with hard covers sell better than paperbacks.
D. More people like TV programs about famous men.

查看答案和解析>>

科目：高中英語 來源：江蘇省鎮(zhèn)江市2009-2010學(xué)年度高一第二學(xué)期期中考試英語 題型：閱讀理解


D
Some years ago factories had more freedom than they have now, and they did not need to be as careful as they must be today. They did not need to worry a lot about the safety of the new products (產(chǎn)品) that they developed. They did not have to pay much attention to the health and safety of the people who worked for them. Often new products were dangerous for the people who used them; often conditions in the work place had very bad effects on the health of the workers.
Of course sometimes there were real accidents which attracted the attention of governments and showed the need for changes. Also scientists who were doing research into the health of workers sometimes provided information which governments should pay attention to. At such times, there were inquiries(調(diào)查) into the causes of the accidents or the problems. New safety rules were often introduced as a result of these inquiries; however, the new rules came too late to protect the people who died or became seriously ill.
Today many governments have special departments which protect customers (顧客) and workers. In the U.S., for example, there is a department which tests new airplanes and gives warnings about possible problems. It also makes the rules that plane producers (生產(chǎn)商) must follow. Another department controls the foods and drugs that companies sell. A third department looks at the places where people work, and then reports any companies that are breaking the laws which protect the health and safety of workers. Of course, new government departments and new laws cannot prevent every accident or illness, but they are having some good results. Our work places are safer and cleaner than before. The planes and cars which we use for travel are better. Producers are thinking more about the safety and health of the people who buy and use their products.
67. Some years ago safety rules __________.
A. were put forward due to workers’ suggestions
B. came into being as a result of the workers’ needs
C. were introduced because many people were killed or seriously injured
D. were good enough to protect workers and customers
68. It can be inferred from the passage that in the past __________.
A. workers often got ill because of the poor working conditions
B. companies had less freedom to develop new products
C. many people were killed by dangerous products
D. factories were as careful as they are today
69. According to the passage, __________.
A. new laws have no good results at all
B. governments did not listen to scientists
C. governments paid no attention to the safety of products at all
D. in the past factories did not have to pay much attention to the health of workers
70. The main topic of the passage is __________.
A. conditions in the work place               B. the importance of government departments    
C. the freedom of factories                          D. the safety and health of workers and customers

查看答案和解析>>

同步練習(xí)冊(cè)答案