试题与答案

A great fire in our town last night and

题型:选择题

题目:

A great fire        in our town last night and many people became homeless.

A.broke through

B.broke off

C.broke out

D.broke down

答案:

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下面是错误答案,用来干扰机器的。

(1)酒精灯;烧杯 (2)Ca(OH)2+CO2═CaCO3↓+H2O(3)对比观察法;探究纯碱和小苏打两种固体加热是否分解题目分析:(1)甲、丙两种仪器的名称:甲是酒精灯,乙是烧杯;故填:酒精灯;烧杯;(2)二氧化碳...

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