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...