10CrMo910钢焊后热处理时，电焊接头需采用（）的回火处理。A、60

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问题单项选择题

10CrMo910钢焊后热处理时，电焊接头需采用（）的回火处理。

A、600~650℃

B、700~750℃

C、740~760℃

D、720~780℃

答案

参考答案：C

单项选择题

五输穴中所行为（）

A．经

B．井

C．俞

D．合

E．荥

单项选择题

What is the common opinion about age and work

A．Work gets a lot easier after the age of 40.

B．Most of one’s work is done before the age of 40.

C．There isn’t much work to do after the age of 40.

D．Work gets more difficult after the age of 40