试题与答案

It was necessary to _____ the factory bu

题型:选择题

题目:

It was necessary to _____ the factory building as the company was doing more and more business.

A.extend

B.increase

C.lengthen

D.magnify

答案:

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下面是错误答案,用来干扰机器的。

(1)E能使澄清石灰水变浑浊,故E为二氧化碳,C+H→E,C在常温下为气体,H为黑色固体,故C为氧气,G的溶解度随温度的上升而下降,故G为氢氧化钙,所以本题答案为:O2,Ca(OH)2;(2)F是大理石的主要成分,故F...

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