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【简答题】

Below is a table showing the incomes based on different educational level. Look at the table and write an essay of about 120 words reference to the following points:   1. the relation between the incomes and the educational level   2. What causes this change   3. What’’ s the trend in the future

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参考答案:
参考解析:
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刷刷题刷刷变学霸
举一反三

【单选题】Why did the resistance of insects to man -made insecticides develop so rapidly

A.
Because fanners use less insecticides now.
B.
Because farmers have been using insecticides for many years.
C.
Because insects are using the mechanisms against poisons produced by plants to deal with insecticides.
D.
Because insects have been eating plants for many million years.

【单选题】常用的不确定性分析方法不包括( )。

A.
概率分析法
B.
敏感性分析法
C.
财务费用法
D.
盈亏平衡分析法