问题
单项选择题
金属线槽布线的直线段长度超过（）时。宜设置伸缩节。
A、20M
B、30M
C、40M
D、50M
答案
参考答案：B
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金属线槽布线的直线段长度超过（）时。宜设置伸缩节。
A、20M
B、30M
C、40M
D、50M
参考答案：B
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| Mr Li and his wife live in a city. He 1 hard in his office. He likes to read something when he's 2 . And he often watches TV or listens to the 3 at home. So he knows a lot. A few days ago an important 4 was held in Beijing. Mr Li was interested in it. That afternoon, on his way home, he went to the post office and 5 a newspaper. When he got home, he put it on the table and began to 6 .Soon his wife came back, and she began to tidy up the room. After 7 Mr Li wanted to read the newspaper, but he could not find it. "What are you 8 ?" asked his wife. "A newspaper." "I 9 it away a moment ago. " "Why did you do so?" Mr Li said angrily. "It's new. There's 10 in it." "I don't think so," .said the woman. "I put some rubbish in it, and threw it away. " | ||||
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