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【多选题】
按位移求解平面问题及验证已知位移是否为问题解,位移解法优势等,以下说法正确的是A.
位移分量须满足位移表示的平衡微分方程，书中式(2-20)
B.
边界上需满足位移边界条件(2-17)或应力边界条件(2-21)
C.
位移解法适用于任何平面问题，不论体力是不是常量，也不论问题是位移边界问题还是应力边界问题或混合边界问题
D.
多连体需满足位移单值条件
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举一反三
【单选题】汽车在水平良好路面超车行驶时,受到的行驶阻力有 。
A.
驱动力、空气阻力、滚动阻力
B.
坡度阻力、滚动阻力、加速阻力、空气阻力
C.
坡度阻力、空气阻力、滚动阻力
D.
加速阻力、空气阻力、滚动阻力
【单选题】男性，45岁。因肝硬化(失代偿期)入院。1天前出现明显呼吸困难，查体：T正常，双肺呼吸音清，血气分析示低氧血症。抗感染治疗无效。最可能发生的并发症是
A.
肺炎
B.
肝肾综合征
C.
肝肺综合征
D.
支气管哮喘
E.
急性左心衰
【简答题】从IPv4向IPv6过度的两种常用方法是 和 。
【单选题】It makes no difference to him______ you stay here or go to Hong Kong.
A.
how
B.
whether
C.
what
D.
why
【多选题】Dialogue B
A.
How long does it take?
B.
How can I get there?
C.
Thank you very much.
D.
How far is it from here?
E.
Which bus shall I take? A: Excuse me,I want to go to the library. 6 B: Go down this street and turn right at the second crossing. Go up the road to the end, you will find it. A: 7 B: It’s about 1,000 metres away from here. A: Oh. That’s quite a long way. B: Yes. You’d better take a bus. A: 8 B: You can take the No. 5 bus. It’ll take you there. A: 9 B: It takes about five minutes. A: 10 B: It ’ s my pleasure.
【多选题】A: Excuse me, I want to go to the library. 1 B: Go down this street and turn right at the second crossing. Go up the road to the end, you will find it. A: 2 B: It’s about 1,000 metres away from here. ...
A.
How long does it take?
B.
How can I get there?
C.
Thank you very much.
D.
How far is it from here?
E.
Which bus shall I take?
【简答题】PartI Listening A: 1.A) Let’s go now. B) Don’t mention it. C) Sit down, please. D) Yes, I am. 2. A) Yes, it is. B) All right. C) Sure, I will. D) Never mind. 3. A) Nice. B) Sure. C) I think so. D) Yes...
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