问题
单项选择题
强力型橡胶带的宽度若为800mm，其布层数（层）为（）。
A.3～6
B.3～8
C.3～10
答案
参考答案：A
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强力型橡胶带的宽度若为800mm，其布层数（层）为（）。
A.3～6
B.3～8
C.3～10
参考答案：A
We make traffic rules to keep order on the roads. These rules also help keep us 1 on the roads. People have to 2 many traffic rules. In China, you must walk 3 the sidewalk or on the side of the road. Look carefully (仔细地) before you 4 the street. If you are riding a bike, don't ride in the middle (中间) of the roads or run through (通过) the road when the traffic light is 5 . When you ride a bike 6 a friend, don't look around and talk. If you drive, you must slow down at the traffic lights. You must always 7 a seat belt安全带). Without (没有) belts, 8 the driver and the other people in the car may hurt themselves when the car stops suddenly (突然地). When you take a bus, you must be 9 . Get on or get off a bus only when it comes to a 10 When it’s full (满的), you shouldn't get on it or you may fall down.
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