題目列表(包括答案和解析)
Happiness and sadness are states of being states of being that define the way we view the world. It is often said that some people by nature have a sunny character. Now scientists may have discovered why.
Some people may be hard-wired for happiness, while others are genetically negative, as
scientists have suggested in a study published in late February, in a British journal Proceedings of the Royal Society B.
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 (血清素) 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 of the gene. Two so-called "short" variants were linked to a higher risk of depression and suicide attempts. Unlike the two "short" variants, the "long" 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, led by Elaine Fox, showed participants a
series of images. The images were divided into three kinds: negative ones aimed at inspiring fear or stress such as a spider or person about to commit suicide, pleasant ones and neutral 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.
67.Form the third paragraph, we know that .
A.a(chǎn)ffected by 5-HTTLPR, the neurotransmitter serotonin works within the blood
B.there are 5 variants of 5-HTTLPR genes which control people’s moods
C.how the neurotransmitter serotonin works is greatly determined by 5-HTTLPR
D.5-HTTLPR receives chemical messages from verve cells
68.What does “It” in the sentence “It has been closely linked to mood.” in the 3rd paragraph refer to?
A.Serotonin. B.A nerve cell. C.5-HTTLPR. D.The brain.
69.If a person had the long variant of 5-HTTLPR, he or she would probably .
A.like the images of spiders B.prefer the images of crocodiles
C.enjoy an image of green tress D.suffer from depression very often
70.What can we infer from the passage?
A.People’s moods can change a little bit under the influence of certain drugs.
B.Researchers showed participants of the research two kinds of images.
C.A person possesses one long and one short variant of 5-HTTLPR at the same time.
D.The author firmly believes that “happiness workshops” will not change people’s moods.
Governments and health officials around the world continued to take steps Tuesday against the outbreak of swine flu that has killed scores of people in Mexico and spread to the U.S.,Europe and possibly Asia.
By early Tuesday,the swine flu outbreak in Mexico had caused in 152 deaths and more than 1,600 illnesses.So far,at least 113 cases have been proved worldwide,including 64 in the United States;six in Canada;11 in New Zealand and two each in Spain the United Kingdom and Israel.None has yet resulted in death.
T'he World Health Organization on Monday raised its alert level from three to four on its six-level scale.The move means the U.N.agency has determined that the virus can transmit from human to human.
“In this age of global travel,where people move around in airplanes so quickly,there is no region to which this virus could not spread,”said Fukuda,assistant director-general of the WHO.
Governments around the world struggled to prevent further outbreak.Some,like China and Russia,banned pork imports from the United States and Mexico U.S.President Barack Obama said the outbreak was a cause for concern,not for alarm.The gov-ernment urged travelers to avoid non-essential travel to Mexico.
The latest WHO report listed only seven proved swine flu deaths in Mexico but it was not clear why there was the discrepency.
Mexico City has closed all schools until at least May 6 to help curb (contro1) the spread of swine flu and ordered 35,00 public venues to close or serve only take away meals.In addition,bars,clubs,movie theaters,pool halls,gyms,sport centers and convention halls have been told to close until May 5.Armed police officers are also guarding hospitals in Mexico City while roads and schools in the city of 20 million people are deserted.Officials also have talked about shutting down the bus and subway systems.
【小題1】When learning the outbreak of swine flu,the WHO was .
A.calm B.nervous
C.shocked D.careful
【小題2】Fukuda’s words suggest that .
A.he likes travel by air
B.global travel hasn’t been affected
C.this virus can spread quickly because of global travel
D.planes must be forbidden to take to prevent swine flu
【小題3】The last paragraph mainly tells us .
A.Mexico has taken measures to control swine flu
B.Mexico City is too dangerous to live in
C.the normal life in Mexico has been changed
D.people in Mexico are badly in need of help
More and more students want to study in“hot”majors. 1 a result, many students want to 2 their interests and study in these 3 such as foreign languages, international business and law, etc.
Fewer and fewer students choose scientific majors, 4 maths, physics and biology, and art majors, 5 history, Chinese and philosophy.
6 students can study in these“hot”majors, because the number of these“hot”majors 7 limited.
If one 8 interest in his work or study, 9 can he do well? I 10 this from one of my classmates.He is 11 the countryside.His parents are farmers.Though he 12 biology, he chose“international business”.He 13 to live a life which is different 14 of his parents.
In the end, he found he 15 in doing business.He found all the subjects to be 16 . 17 this wouldn't have happened if he had chosen his major according to his own interests.
Choosing a major in university 18 decide one's whole life.Majors 19 are not“hot”today may become the“hot”major of tomorrow.
Choosing your major according to your own 20 is the bestway to succeed.
1.A.Being B.For C.Having D.As
2.A.give up B.appear C.give D.master
3.A.place B.room C.areas D.space
4.A.for example B.much as C.and so on D.as a result
5.A.even B.like C.just D.or
6.A.Only a few B.Quite a few C.Perhaps D.Many
7.A.is B.are C.would be D.have been
8.A.had no B.had C.has no D.has
9.A.why B.and what C.how D.and how
10.A.suggested B.guessed C.searched D.learned
11.A.out of B.off C.in D.from
12.A.studied B.likes C.learns D.succeeds to study
13.A.wants B.doesn’t want C.enjoys D.doesn’t like
14.A.from which B.from that C.for which D.for that
15.A.was interested B.was clever C.was not interested D.was not clever
16.A.lovely B.rare C.obvious D.tiresome
17.A.So B.Then C.Just then D.Maybe
18.A.can B.does not C.probably D.perhaps not to
19.A.on which B.in which C.which D.——
20.A.interests B.experience C.mind D.heartCloze
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