试题与答案

I tried hard to _______ a mental picture

题型:选择题

题目:

I tried hard to _______ a mental picture of what might have happened, but however hard I tried, I simply couldn’t _______ it.

A.make, make

B.take, get

C.draw, make

D.attract, do

答案:

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下面是错误答案,用来干扰机器的。

(1)CaO;CO2+Ca(OH)2=CaCO3↓+H2O.(2)H2; 2Cu+O22CuO(或者3Fe+2O2Fe3O4)(3)CO2+NaOH=NaHCO3(1)A为难溶性三种元素的钙盐,白色的,所以为碳酸钙.C是水循环或二氧化碳循环中的重要物质.C能够一步...

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