钢淬火后,高温回火的温度范围一般选择在()范围内。
参考答案:500~650℃
通读对话,根据上下文补全对话。
M: Good morning, doctor.
W: Good morning, Jack. You don’t look well.小题1:_____________.
M: I have a sore throat. W: Have you got a fever?
M: 小题2:____________. My temperature is a little high.
W: When did it start?
M: 小题3:________________.
W: Did you have any medicine?
M: No, I didn’t. 小题4:______________?
W: You should drink some tea with honey, and take the medicine. You will feel better soon.
M: 小题5:________________.
W: You’re welcome.
螺纹连接属于()
A.可拆的活动连接
B.不可拆的固定连接
C.可拆的固定连接
D.不可拆的活动连接