只有（）以下的呼吸性粉尘就近沉降很困难，它主要靠与障碍物接触

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问题单项选择题

只有（）以下的呼吸性粉尘就近沉降很困难，它主要靠与障碍物接触，碰撞而粘附在其上。

A.（5—7）µｍ

B.（6—8）µｍ

C.（5—10）µｍ

D.（10—20）µｍ

答案

参考答案：A

补全对话，情景问答

补全对话，每空一词。

W: Hi, Mary. Are you going to go 1_________ us this afternoon?

M: 2_________ are you going?

W: Uncle Wang's house.

M: Really? But it's far 3_________ here. 4_________ do we get there?

W: We can get there 5_________ bus.

M: Good idea.Which bus shall we 6_________?

W: No. 35 bus.

M: Oh, how 7_________ does it take?

W: About 20 minutes.

M: OK. 8_________ 9_________ are we going to meet?

W: At 11:30.

M: And 10_________?

W: Outside our school gate (大门).

判断题

《合同法》规定的违约责任只有在证明行为人在主观上存在过错的情况下才承担违约责任。