单项选择题

爆炸下限和爆炸上限以外的范围称爆炸极限。
A、正确
B、错误

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‌弗雷泽所著[填空1]是纯书斋研究的产物。

答案：金枝

单项选择题

______ is an expression that people use when they want to shorten a long story or explanation just by giving it the basic answer.

A．Long story short
B．Only half the story
C．It's a long story
D．Only part of the story