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问题 选择题

按下图装置，持续通入X气体，可以看到a处有红色物质生成，b处变蓝，c处得到液体，则X气体是

[ ]

A．H2

B．CO和H2

C．NH3

D．CH3CH2OH（气）

答案

答案：D

解答题

3570÷35+4605=

425×（6386÷31）=

1006×（178+6500）=

456+1710÷45=

879+563×29=

4789+6370÷65=
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选择题

In my opinion, you won't ________ the fact that you have made another mistake in your work. [ ]

A. get away with  

B. get along with

C. keep up with  

D. keep in with
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