问题
单项选择题
《煤矿安全规程》规定，局部通风机因故停止运转，在恢复通风前，必须首先检查瓦斯，只有停风区中最高瓦斯浓度不超过（）和最高二氧化碳浓度不超过1.5%，且符合开启局部通风机的条件时，方可人工开启局部通风机，恢复正常通风。
A、1.5％
B、1.0%
C、0.5%
答案
参考答案：B
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《煤矿安全规程》规定，局部通风机因故停止运转，在恢复通风前，必须首先检查瓦斯，只有停风区中最高瓦斯浓度不超过（）和最高二氧化碳浓度不超过1.5%，且符合开启局部通风机的条件时，方可人工开启局部通风机，恢复正常通风。
A、1.5％
B、1.0%
C、0.5%
参考答案：B
| 阅读下面短文，把A-D四个句子填入文中空缺处（1-4），使短文内容完整正确，然后完成第5题。 | |
| Driving cars is an important part of our lives. We may do it every day to get to work, to school or to visit friends. (1) ____________________ Waiting in line at a red light, a driver may get impatient and decide just to drive right through it. If another car is coming from the other direction, there might be a terrible accident. Cutting another car off can make its driver angry, so that driver cuts off someone else. (2) ___________________ (3) ____________________ In Taiwan alone, over seven people are killed in accidents every day. The yearly death rate from traffic accidents in Taiwan is twice as many as that in Japan. To allow traffic to move smoothly and safely, everybody must follow the rules. Before you drive, learn all the traffic laws. (4) _____________________ | |
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| 5. What's the best title for this passage? | |
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| A. Traffic Safety. B. Be Careful. C. Driving a Car. D. Traffic Accidents. |