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（）指出：“每个人的力量是有限的，但只要我们万众一心、众志成城，就没有克服不了的困难；每个人的工作时间是有限的，但全心全意为人民服务是无限的”。
A、毛泽东
B、邓小平
C、胡锦涛
D、习近平

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单项选择题
纯虚函数是一个非成员函数。
A．对
B．错
未知题型
Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies neeD.It has been demonstrated that rats will, when given a choice over a period of time, prefer water with vitamins to water without vitamins even though there is no difference in taste or smell between the two water bottles. When a fragrant flavor was added to the vitamin enriched fluid, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were switched to the clear water. In time, however, they broke the habit and went back to where the necessary vitamins werE.
In a classic experiment, babies of 6 to 12 months old were placed in a cafeteria feeding arrangement, with a wide selection of baby food before them. They were given whatever food they pointed to or appeared interested in. We are told that at first they showed some unusual eating patterns, but that over a period of time they managed to select well-balanced diet.
So, in selecting food, rats and babies do seem to know and act on what‘s best for them.Apparently, there is a kind of "body wisdom" . which hmnans soon losE.Most of us do not eat as wisely as we coulD.
Many of our food preferences are culturally determined and influenced by long-established habits. Some people eat fox, dog and blackbirds, while we eat cows and pigs. So what people eat and how much they eat seem to be greatly influenced by what is going on around them.
In the experiment on rats, a fragrant flavor was added to the rat‘s drinking water to()
A.encourage rats to drink vitamin-enriched water
B.find out rats preference in flavor
C.test whether rats know which drink is good for them
D.demonstrate that vitamins aretasteless
The expression 'the habit”（ Line 6, Paragraph 1. refers to drinking water which （）A.has no smell
B.is tasteless
C.has vitamins
D.is flavored
According to the passage, adults eating habits differ from those of babies because （）A.adults know better than babies what kind of food is good for their health
B.adults usually cannot resist the temptation of various delicious foods
C.adults‘ eating habits are closely related to the social and cultural customs
D.adults have more choices of food than babies in eating patterns
The author implied in the passage that most of us （）A.eat a balanced diet
B.choose the food that is of nutrition
C.have the habits influenced by the surroundings
D.like to eat the food with a fragrant flavor
As far as their eating habits are concerned, babies and rats are similar in that （ ）A.both have the wisdom to choose a balanced diet
B.both prefer flavored food and drink
C.both have the same eating patterns
D.both develop a taste for the same kinds of flavors
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判断题
第一代货币危机理论认为紧缩性财政货币政策是防止货币危机发生的关键。
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