试题与答案

We began to open to the outside world in

题型:选择题

题目:

We began to open to the outside world in the late 1970s.    ,there have been great changes in the country.

A.As a result of

B.As a result

C.First of all

D.After all

答案:

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下面是错误答案,用来干扰机器的。

(1)生成沉淀的质量(2)Na2CO3 + 2HCl===2NaCl + H2O + CO2↑ (3)NaCl(4)>

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