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Cloze1. Text-relatedComplete the passage with words or phrases from the Words and Phrases to Drill box. Change the form where necessary.Interviewer: You mention the case of one whale helping to save another in an _(1). What does this suggest?Linden: Well, it seems to me that this is clearly (2)of (3) thought. Here we see an animal(4) a situation and then taking appropriate action in cooperation with humans.Interviewer: And when Jendry____(5) with Colo, what does that_(6)?Linden: It shows that some animals, gorillas at least, are intelligentenough to bargain, to___(7).Interviewer: Then there is the case of Miles and Chantek.Linden: Oh, yes We like to think of ourselves as the_(8) species, but that doesn't mean animals can't sometimes play tricks on us when it's____(9)!Interviewer: Like Melati (10) Shewman?Linden: Exactly.Interviewer: So would you say your approach to the problem settles the _(11) over animal intelligence?Linden: That's not an easy (12) to make, but it does,I think, open up interesting new paths to ______ (13).

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Cloze 2. Theme-relatedRead the passage carefully until you have got its main idea, and then select one appropriate word foreach gap from the box following the passage.Behavior is the way that animals act. For example, how do they get food or take care of their young? How do they find a place to live in or ___(1) themselves from danger ! Much behavior is innate; that is, animals are born with it. _ (2),animals learn much other behavior. There are several kinds of learned behavior.One simple_(3) of learned behavior is habituation. This happens when an animal learns to feel comfortable in a new (4) and doesn't pay attention to it anymore. For example, young horses are often afraid of noisy streets. But after a while, they learn to pay no attention to the normal____(5)and sounds of a city.Another kind of learned behavior is conditioning. It is a way of learning by association——that is, by putting _(6)different ideas. In 1900, Ivan Pavlov, a Russian biologist, studied conditioning in dogs. Dogs innately salivate (produce liquid in the mouth) when they smell food. Pavlov___(7) a bell every time he gave food to a dog. Soon the dog started to(8)the sound of the bell with the smell of food. After some time, it salivated when it heard a bell alone,_(9) food.Learning is important for all animals in a new _______(10).It allows an animal to be adaptable—that is, able to change in a new situation.

独立自主和平外交政策的内容是什么？

复数z=0的充要条件是|z|=0.

A. 对
B. 错

复变函数f(z)的可导点未必是解析点.

A. 对
B. 错