题目内容

掘进上山时应特别注意()工作。
A 通风排瓦斯
B 防跑车
C 防滑

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综合机械化采煤矿井新掘运输巷一侧，自道碴面起 1.6m高度内，必须留有宽()m以上的人行道。
A 0.5
B 0.8
C 1

根据以下内容，回答题。
Mobile phones help us communicate everywhere， which is very important. They are good at emergencies，when you"ve 1 a car accident，for instance. A mobile phone. 2 save your life! Mobile phones are also 3 because they have many good features——we can take photos and send them all over the world. But every coin has two sides. The 4 thing about mobile phones is that you have no privacy. My boss and friends find me whenever they want! I haven"t enjoyed a whole quiet day since the day I 5 my mobile phone. 6 disadvantage is that mobile phones make us lose good habits， such as punctuality. Before， when we 7 keep in touch so easily， if we had a date with someone， we tried our best to arrive 8 time. But now， because of the mobile phone， we are not afraid of 9 late any more， so， surprisingly enough， we make people wait ! The third 10 I see is that I change my mobile phone once a year， and this means I"m spending 11 too much money on it. I think it is important to think 12 we use mobile phones. We should use things such as mo- bile phones， laptops， cameras， the Internet， and so on， 13 our needs. We can 14 our mobile phone， when we don"t want to be disturbed by 15 If we know how to use it， we can eliminate its disadvantages.
when you"ve 1 a car accident，

A. have
B. made
C. had
D. crashed

由下向上掘进()以上的倾斜巷道时，必须将溜煤(矸)道与人行道分开，防止煤(矸)滚落伤人。
A 15°
B 25°
C 30°

检修掘进机时，严禁其他人员在截割臂和转载桥下方()或作业。
A 走动
B 停留
C 工作