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【单选题】
通常的施工顺序是（ ）。 A， 先地上后地下、先浅后深、先主体后装修、先土建后安装A.
先地上后地下、先深后浅、先主体后装修、先土建后安装
B.
先地下后地上、先深后浅、先主体后装修、先土建后安装
C.
先地下后地上、先浅后深、先主体后装修、先土建后安装
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【简答题】发热对电器会产生哪些不良的影响？
【单选题】听力原文：W: Yes, sir. You rang? M: Yes, I wonder if you could bring me another martini. W: Certainly. Would you like anything else? M: Well, I suppose this is kind of foolish, but my son-in-law is suppose...
A.
At the airport.
B.
At a hotel.
C.
On a plane.
D.
At a restaurant.
【单选题】听力原文：W: Are you going to attend the lecture this evening? M: Well. I wonder if Jason can make it. He hasn't finished his maths paper. W: I think he will have finished it by six. M: Sounds like there i...
A.
go on writing his paper.
B.
attend the lecture.
C.
miss the lecture.
D.
try to solve the problem.
【单选题】听力原文：W: There are so many children at the school. I wonder how the teacher keeps track of them. M: I used to get cold feet at the thought of teaching a class of 50. Q: What was the man's attitude towa...
A.
Timid.
B.
Hostile.
C.
Enthusiastic.
D.
Sympathetic.
【单选题】高频电流对交流接触器产生何种不良影响？（）
A.
高频谐波电流将使线路中等效电容的容抗降低致使发生线路漏电
B.
高频电流将引起交流接触器一次回路发热，同时高频谐波造成线圈铁芯的磁通量饱和致使电磁吸合作用被削弱，同时伴随有动作拖滞、发热和发出强烈噪音等故障
C.
高频谐波电流使热继电器测温双金属片弯曲变形的推动力被加强，由此发出错误的过载信息致使交流接触器误动
D.
高频谐波产生强烈的EMC 干扰信号，使得交流接触器的工作不稳定
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