题目内容

生活质量

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什么叫一次烧成和两次烧成?

Are you going on holiday for a long time?()

A. It was a long time.
B. Two weeks ago.
C. No. Only a couple of days.
D. Not long time ago.

流化床(温克勒)气化工艺的优点?

牵引变压器直接落座在车体底架上。

A. 正确
B. 错误

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