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问题 单项选择题

预防医学控制疾病发生两大关口（）

A.防疫和食品卫生

B.管理与监督

C.卫生知识的宣传与检查

D.对传染病、地方病、流行病进行调查与隔离

E.及时上报与及时隔离传染病

答案

参考答案：A

选择题

_______,but it is also a great way to lower the number of greenhouse gases in the air.

A．Not only a fun thing is it to do

B．Not only a fun thing to do it is

C．Not only it is a fun thing to do

D．Not only is it a fun thing to do
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单项选择题

Which of the following statements can be inferred from the passage a. An investor of trading stocks only cares about the fixed assets of companies. b. A buyer of investing stocks is always concerned about the performance of companies. c. Most people keep their investing stocks for a longer period of time. d. All people buy trading stocks and investing stock at the same time.
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