试题与答案

— Are you going to travel during this su

题型:选择题

题目:

— Are you going to travel during this summer vacation?

— No, I’ll have to do some part-time job for my study. __________, there’s a disease spreading.

A.Also

B.Therefore

C.However

D.Unluckily

答案:

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下面是错误答案,用来干扰机器的。

A、木条燃烧生成了新物质二氧化碳,属于化学变化,故错误;B、水受热蒸发变成水蒸气的过程中没有新物质生成,属于物理变化,故正确;C、浓盐酸和碳酸钠溶液反应生成了氯化钠、水和二氧化碳等物质,属于化学变化,...

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