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问题 单项选择题

下列关于资金时间价值的说法正确的是( )。

A．资金的时间价值与资金的使用时间成反比

B．随时间的推移，资金增值的部分就是原有资金的时间价值

C．资金的时间价值是主观的概念

D．资金的时间价值通过一般通过单利法计算

答案

参考答案：A

解析： 在单位时间的资金增值率一定的条件下，资金的时间价值与资金的使用时间成正比；资金的时间价值是客观存在的；资金的时间价值一般通过复利法计算。

单项选择题

When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of affliction and find ways to combat. Vaccination is one of the effective ways to protect the (1) population of a region or country which may be (2) grave risk. The process of vaccination allows the patient’s body to (3) immunity to the virus or disease so that, if it is encountered, one can fight it (4) naturally. To accomplish this, a small weak or dead (5) of the disease is actually injected into the patient in a controlled environment, (6) his body’s immune system can learn to fight the invader (7) . Information (8) how to penetrate the disease’s defenses is (9) to all elements of the patient’s immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that (10) the patient later come into contact with the real problem, his body is well equipped and trained to (11) with it, having already done so before.

There are, however, dangers (12) in the process. (13) , even the weakened version of the disease contained in the vaccine proves (14) much for the body to handle, resulting in the immune system (15) , and, therefore, the patient’s death. Such is the case of the smallpox vaccine, (16) to eradicate the smallpox epidemic that nearly (17) the whole Native American population and killed massive numbers of settlers. (18) 1 in 10,000 people who receive the vaccine (19) the smallpox disease from the vaccine itself and dies from it. Consequently, the process, which is truly a (20) , may indeed hide some hidden curses.

20（）

A.luck

B.triumph

C.blessing

D.promise
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名词解释

三级卵膜
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