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【单选题】
下列图形中哪个杆为连杆()?A.
1
B.
2
C.
3
D.
4
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参考解析：
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【单选题】I'm sorry to arrive late, but the car______.
A.
broke back
B.
broke down
C.
broke off
D.
broke through
【单选题】听力原文：M: I'm sorry I don't know when to get off. Would you please tell me when we arrive at the Friendship Hotel? W: Don't worry. I'll remind you when it's your stop. Q: What is the man? (16)
A.
A bus passenger.
B.
A cabin passenger.
C.
A bus conductor.
D.
A train passenger.
【单选题】在坐姿控制台的设计中，首先应在操作者视水平线以上10°至以下30°的范围内设置斜度为（）的面板，该面板上配置最重要的显示器。
A.
10°
B.
15°
C.
20°
D.
25°
【单选题】听力原文：W: The Americans came from America. That's easy, isn't it? M: I'm sorry to say you are wrong! The Americans came from almost every part of the world. That's to say, mare than 230 million people n...
A.
Because Americans love melting pot.
B.
Because Americans came from almost every part of the world.
C.
Because America is famous for melting pot.
D.
Because America contains a large number of people.
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