题目内容

金属蠕变变形的两个机制分别是____。

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金属长时间的恒温、恒载荷作用下缓慢产生塑性变形的现象称为()

金属蠕变过程可以分为哪三个阶段?

The way to____ information from one form to another is called a transition device .

Research has shown visualisation can not help second language learners to comprehend meaning while reading .

A. 对
B. 错

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