燃烧的主要类型有（）、闪燃、着火、爆炸。A、闪点 B、燃点 C_爱下问搜题

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问题单项选择题

燃烧的主要类型有（）、闪燃、着火、爆炸。

A、闪点

B、燃点

C、自燃

D、易燃

答案

参考答案：C

选择题

John had to have his car repaired in a garage because it _____ seriously.

A. damaged
B. was being damaged
C. had damaged
D. had been damaged

填空题

（）是将空心工序件或管状毛坯沿径向往外扩张的冲压工序。