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【单选题】

4()

A. at
B. in
C. on
D. by

A.
There is probably no sound in (1) more chilling than the " hiss " of a diamondback rattlesnake. There is good reason: the western diamondback has killed more humans than (2) snake. It is easily excitable, very aggressive, frequently hungry, and deadly poisonous. Yet it doesn’t really hiss. Rather, it (3) its tail. A mature rattler can move its tail up and down between fifty and a hundred times a second! The hollow rattles (4) the tail, beating against each other, create the "hissing" sound.
B.
Why does this creature (5) rattles Rattlesnakes molt three times a year, shedding their outer layer of skin each time. But the molting skin near the tail is not discarded. (6) it hardens and hollows out, becoming another rattle. If a snake had never lost any rattles, you could (7) its age by counting them and dividing by three.
C.
Do the snakes need their rattles The rattles cannot be used in a mating call, (8) rattlesnakes are deaf. They are not a sign of hunger, for snakes with full stomachs rattle as often as hungry (9) . And in the wild, the rattling scares prey. It does not (10) them. Therefore, scientists believe that snakes use rattles merely to warn larger animals not to step on (11) . They have studied them extensively and found that it was a function more important in ages past when the rattlers shared the plains (12) 60 million buffalo!
D.
Rattlesnakes are one of the (13) advanced forms of " pit " vipers—animals who possess an organ for an extra sense. The pit organ is like an infrared radar sensor. (14) in the snake’s head, the pit organ can sense differences in temperature between inside and outside itself—differences as small as 1% of a degree. Not only can rattlesnakes (15) sense the presence of another animal—or a human—but they apparently can (16) determine its direction and range. These animals don’t feed on (17) , of course. Their poison, however, may kill humans. But this happens only in (18) they think is self-defense.
E.
Rattlesnakes are really quite (19) Their principal diet of mice and rats makes them valuable to the ecology of the West. So rather than fear them, we should respect the (20) they play in containing the population of these harmful pests.
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【单选题】According to researchers, people’s gestures are(). A.incidental B.comprehensible C.isolated D.precise

A.
All of us communicate with one another verbally (口头的) as well as non-verbally. Most of the time we are not aware that we’re doing it. We wave a hand, meet someone else’s eyes or look away, shift positions in a chair. We make these movements unconsciously. But researchers have discovered that there is a system to them almost as consistent (一致的) and comprehensible as language.
B.
Every culture has its body language. The way an Englishman crosses his legs is nothing like the way a male American does it. In talking, Americans are likely to end a statement with a lowering of the eyelids. They conclude a question with a lift of the hand or a widening of the eyes. With a future-tense verb they often gesture with a forward movement. There are regional idioms too. Your sex, ethnic background, social class and personal style all influence your body language. Nevertheless, you move and gesture within a certain idiom.
C.
Usually, the wordless communication acts to qualify the words. What the non-verbal elements express very often, and very efficiently, is the emotional side of the message. When a person feels liked or disliked, often it’s a case of "not what he said but the way he said it."
D.
Experts in the study of communication through body movement are not prepared to spell out a precise vocabulary of gestures. When an American rubs his nose, it may mean he is disagreeing with someone or rejecting something. But there are other possible interpretations, too. The expert looks for patterns in the context, not for an isolated meaningful gesture.

【单选题】Passage One The word most often used by outsiders to describe the Watts and other riots is "senseless". Why would people destroy their own community Popular explanations of riots focus o...

A.
the Watts riot was senseless
B.
the Watts riot was a criminal behavior
C.
most of the Watts residents were active participants in the riot
D.
most of the Watts residents were in favour of the riot

【单选题】Passage Two Regular child care provided outside home or by someone other than the mother does not in itself undermine(削弱) healthy emotional connections between mothers and their 15-month...

A.
the researchers started with only one month old infants
B.
the observers could rate the quality of child care efforts and analyzed them soon
C.
the researchers were able to give the questionnaires to mothers in their homes
D.
video equipment enabled researchers to observe what was happening directly

【单选题】下列体现了公民、法人和社会团体实施团体规划的作用的选项为( )。

A.
公民、法人和社会团体如果是完全出于自身利益的投资和置业等活动,即不可认为是对城市规划的实施
B.
公民、法人和社会团体所作出的活动,不论是否遵守城市规划的规定,客观上都有助于城市规划目标的实现,即可视为是对城市规划的实施
C.
公民、法人和社会团体根据城市规划的目标,可以主动有所为,如对城市规划中确定的公益性和公共性项目进行投资,关心并监督城市规划的实施等
D.
公民、法人和社会团体有任何有助于实现城市规划目标的想法和活动,必须首先向有关部门审请,经批准后方可实施