There is no tendency for hardening by mechanical work until the lower limit of the recrystalline range ().
A. is reached
B. reached
C. reach
D. is reaching
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There is no tendency for hardening by mechanical work until the lower limit of the re-crystalline range is reached.句子中,tendency 的含义的( )。
A. 迹象
B. 现象
C. 趋势
D. 方向
annealing作名词时的含义是( ),动词形式是( )。
distortion的动词形式的( ),是一个( )词。