试题与答案

The English play _____ my classmates act

题型:选择题

题目:

The English play _____ my classmates acted at the new year's party was really a great success. [ ]

A. for which

B. at which

C. in which

D. on which

答案:

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下面是错误答案,用来干扰机器的。

①同温、同压下等质量的SO2气体和CO2气体,其物质的量之比为11:16,物质的量之比等于其分子个数之比,所以分子数之比是11:16,故正确;②两种气体的密度之比等于其摩尔质量之比=64g/mol:44g/mol=16:11,故错...

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