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问题 单项选择题

钱先生与太太今年均为39岁，全家人生活费支出平均每月为4000元，休闲娱乐消费平均每月为2000元。夫妇二人共存有银行活期储蓄100000元，其他流动性资产200000元。则理财师根据资料计算出钱先生家庭的紧急准备金月数为（）

A.45

B.50

C.55

D.60

答案

参考答案：B

解析：紧急准备金月数=（流动性资产／平均月支出）=（100000+200000）÷（4000+2000）=50。

填空题

（1）身边处处有化学。请从下列6种物质中选择合适物质的序号填空：①小苏打   ②石灰石   ③盐酸   ④维生素C   ⑤尿素[CO(NH2)2 ]   ⑥氯化钠

a.含氮量最高的常用氮肥    ；b.能治疗胃酸过多的是     ；

c.能用作建筑材料的是     ； d.常吃蔬菜水果可补充的是     。

（2）按要求写出相应的化学式

空气中含量最多的物质         溶于水吸热的物质     
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单项选择题

It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the bases (51) the decisions we make, an d the roots of our habits and skills are to be (52) in our past experiences, which are brought into the present (53) memory.

Memory can be defined as the capacity to keep (54) available for later use. It includes not only "remembering" things like arithmetic or historical facts, but also any change in the way an animal typically behaves. Memory is (55) when a rat gives up eating grain because he has sniffed something suspicious in the grain pile. Memory is also involved when a six-year-old child learns to swing a baseball bat.

Memory (56) not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. It is interesting to compare the memory-storage capacity of a computer (57) that of a human being. The instant-access memory of a large computer may hold up to 100000 "words" —ready for (58) use. An average American teenager probably recognizes the meanings of about 100000 words of English. However, this is but a fraction of the total (59) of information which the teenager has stored. Consider, for example, the number of facts and places that the teenager can recognize on sight. The use of words is the basis of the advanced problem-solving intelligence of human beings. A large part of a person’s memory is in terms of words and (60) of words.

57（）。

A. to

B. with

C. against

D. for
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