常见的焊接变形有（）。A、纵向和横向变形 B、弯曲变形、角变形_爱下问搜题

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问题单项选择题

常见的焊接变形有（）。

A、纵向和横向变形

B、弯曲变形、角变形

C、波浪变形、扭曲变形

D、以上都对

答案

参考答案：D

选择题

Thanks to the immediate rescue, the two boys who had fallen into the river _____ climb onto the bank. [ ]

A. were able to

B. could

C. would

D. should

名词解释

角色扮演法