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【单选题】
拉(压)杆应力公式σ= F N /A 的应用条件是A.
应力在比例极限内
B.
外力合力作用线必须沿着杆的轴线
C.
应力在屈服极限内
D.
杆件必须为矩形截面杆
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举一反三
【简答题】高质量发展阶段是十八届对目前我国经济发展阶段的一个科学判断。( )
【单选题】I'm sorry, but he won't be back to the office until Monday afternoon.
A.
a. I’ll call him Monday morning.
B.
b. All right. Please tell him Chris called.
C.
c. Have him call me on Monday at 9:00 a.m.
【简答题】A．day B．night C．morning D．afternoon
【单选题】听力原文：W: Hello. ABC Company. M: Hello. May I speak to Mr. Strong? W: Oh, he can't come to the phone right now. M: OK, well, you see, I need to talk to him. Could you take a message? W: Yeah. M: Thanks....
A.
He is not in.
B.
He can't come to the telephone.
C.
He is on another line.
D.
He doesn't want to answer the call.
【简答题】A．ran B．walked C．fell D．jumped
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