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问题

If H2 burn in O2, we can get _____.

A:H2
B:H2O
C:O2
D:H2O2
正确答案是:
同类题型

The two pairs of shoes are ______ the same size —-But they are different ______ color

The police wondered________ of them is________ such atraffic accident.

The teacher called Tom to his officebecause he was caught in the exam.

Lily is feeling blue because she didn’t pass the exam. —Let’s .

mothers both work in the same factory.

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