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问题 多项选择题

目前室内分布链路预算对数据业务（PS38D.PS128、PS64）和CS64覆盖边缘条件设定不是（）

A.-70

B.-80

C.-85

D.-90

答案

参考答案：A, C, D

补全对话，情景问答

补全对话，每空一词。

A: Oh,dear, you   1    eat in the classroom.

B: I'm sorry. I'm a new exchange student here. I don' t know the   2    .

A: It doesn't matter.    3    careful next time.

B: Can we eat in school?

A: You can eat    4   the dining hall,but you can't eat in the classroom.

B: I see.Anything   5    ?

A: You can't arrive late    6     class. You can't listen     7    music in the classrooms or hallways.

     Especially you mustn't    8     in the hallways. You may hit others.

B: I remember now. Thanks. My name is Keiko.    9    Australia.

A: My name is John. Welcome   10    America.
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单项选择题

慢性支气管炎最主要的病因是（）

A.环境污染

B.过敏因素

C.气候因素

D.长期吸烟

E.真菌感染
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