题目内容

幼儿经常接触的()m以下的室外墙面不应粗糙。

A. 1
B. 1.3
C. 1.25
D. 1.35

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下列选项不是影响喷水室热交换的因素有()。

A. 喷水量
B. 喷水室结构特性
C. 喷水系数
D. 空气质量流速

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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

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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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幼儿经常接触的()m以下的室外墙面不应粗糙。

A. 1 B. 1.3 C. 1.25 D. 1.35

下列选项不是影响喷水室热交换的因素有()。

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。

采用气流流型为垂直或水平单向流的洁净度等级为()级。

A. 1
B. 1.3
C. 1.25
D. 1.35