题目内容

空气过滤器滤料中纤维间的绝大多数空隙通常()所要去除的粒子的粒径。

A. 小于
B. 大于
C. 等于
D. 大于等于

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采用气流流型为垂直或水平单向流的洁净度等级为()级。

A. 5
B. 4
C. 3
D. 2

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Section A
Directions: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.
(1)

A. Yes, I'd like to know your name.
B. Yes, I'd like to have a talk with you.
C. Yes, I'd like to change some US dollars.
D. Yes, I'd like not to bother you.

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A．She will go for dinner.B．She's going to have a walk.C．She will work very late.D．She w

A. She will go for dinner.
B. She's going to have a walk.
C. She will work very late.
D. She will accept the man's invitation.

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A．The painting is named "Double Tree".B．That sounds wonderful.C．You always say big word

A. The painting is named "Double Tree".
B. That sounds wonderful.
C. You always say big words.
D. What size do you wear, sir？

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空气过滤器滤料中纤维间的绝大多数空隙通常()所要去除的粒子的粒径。

A. 小于 B. 大于 C. 等于 D. 大于等于

采用气流流型为垂直或水平单向流的洁净度等级为()级。

A．She will go for dinner.B．She's going to have a walk.C．She will work very late.D．She w

A．The painting is named "Double Tree".B．That sounds wonderful.C．You always say big word

A. 小于
B. 大于
C. 等于
D. 大于等于