车辆车轴锻造质量缺陷，会引起车辆车轴（）。A、热切 B、冷切 _爱下问搜题

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问题单项选择题

车辆车轴锻造质量缺陷，会引起车辆车轴（）。

A、热切

B、冷切

C、变形

D、裂纹

答案

参考答案：B

选择题

The Internet, as well as newspapers and magazines, ________ a more and more important

part in our daily life.[ ]

A. have played

B. are playing

C. is playing

D. has been played

单项选择题

放出襟缝翼的最大飞行高度是（）

A.15000ft

B.18000ft

C.20000ft