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【判断题】
Zigbee协议主要定义了物理层和链路层的规范 判断对错A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】听力原文：M: Could you tell me a bit about quality control at the factory? W: Well, there are four main quality control inspection points. We begin by visiting our suppliers to make sure we are happy with ...
A.
Three
B.
four
C.
five
【简答题】伸顶通气管高出屋面不得小于（ ），且必须大于最大积雪厚度。
【单选题】听力原文：M: Oh, yes, we work very hard in our factory. W: So you get up early every day? M: Well, I live near the factory, so I get up at about 6:30. W: Do you have breakfast? M: Yes, I have some bread, a...
A.
In a factory.
B.
In a hospital.
C.
On a farm.
【单选题】听力原文：M: What are you going to do about the factory? W: Considering that production has gone down so much and for so long, we'll probably have to close it. Q: What has happened in the factory? (2)
A.
It has been closed.
B.
The production has increased for a long time.
C.
The production has decreased for a long time.
D.
It has been reopened.
【单选题】The new factory is not likely to be built because of ______.
A.
the technical problem
B.
the money problem
C.
the pollution problem
【单选题】伸顶通气管出口的设计正确的是( )。
A.
应高出屋面2.0m以上
B.
设在屋檐檐口或阳台和雨篷的下面
C.
不得小于0.3m且必须大于最大积雪厚度
D.
应布置于通风管内
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