假设未来经济有四种可能状态：繁荣、正常、衰退、萧条，对应发生_爱下问搜题

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问题单项选择题

假设未来经济有四种可能状态：繁荣、正常、衰退、萧条，对应发生的概率是0.2，0.4，0.3，0.1，某理财产品在四种状态下的收益率分别是9%，12%，10%，5%，则该理财产品的期望收益率是（）。

A.8.5%

B.9.1%

C.9.8%

D.10.1%

答案

参考答案：D

解析：将每一种状态下的收益率乘以这种状态发生的概率，再加总求和。即：0.2×9%+0.4×12%+0.3×10%+0.1×5%=10.1%。

完形填空

One afternoon, Tommy was on his way home from school. When he was passing by his neighbor, Mr. Adamson's house, he found thick coming from the window of the house. He was . He thought the house must be on fire and it might be burnt down. He didn't know whether Mr. Adamson was in the house, he knew he must put out the fire at once. So he ran to his own house, rushed into the bathroom and a big barrel（桶） with water. He was in such a hurry that he forgot to the water before he ran back to Mr. Adamson's house. When he reached the window where the smoke was still coming out, he threw the water the house by the window without looking for where the smoke was. The smoke stopped immediately. But at the same time, there was an angry cry from inside the house. was Mr. Adamson. He was standing by the window with so big a pipe （烟斗） in his hand looking at Tommy . Tommy then understood that it must be the pipe. He stood there, and could not a word.
Tommy was very sorry for it. He helped Mr. Adamson clean the floor. However, worst was yet to come. When he went home later, he found his own was flooded （淹没）.

填空题

安全工器具、工具、常用备品备件设置专柜存放，各柜、格应编号，存放时应（）。