【单选题】
井巷揭穿突出煤层时的安全防护措施主要包括避难硐室、反向风门、压风自救装置、___远距离爆破等。
A. 毛巾#
B. 隔离式自救器#
C. 过滤式自救器#
D. 矿灯
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答案
B
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【单选题】
井筒施工以及开拓新水平的井巷第一次接近各开采煤层时，必须按掘进工作面距煤层的准确位置，在距煤层垂距___m以外开始打探煤钻孔，钻孔超前工作面的距离不得小于5m，并有专职瓦斯检查工经常检查瓦斯。
A. 5#
B. 10#
C. 15#
D. 20
【单选题】
开采容易自燃和自燃煤层时，必须开展自燃发火监测工作，建立___，确定煤层自燃发火标志气体和临界值。
A. 自燃发火监测系统#
B. 灌浆站#
C. 各种台账#
D. 水棚或贮存器粉棚
【单选题】
开凿平硐或利用已有平硐作为爆炸物品库时，硐口必须装有向外开启的2道门，由外往里第一道门为包铁皮的木板门，第二道门为___。
A. 木门#
B. 铁皮门#
C. 栅栏门#
D. 防爆门
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( ) 26. Where does the writer of "The little Prince" come from?
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【单选题】
( ) 27. What does the prince do after the fox tells him a secret?
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( ) 28. What does "The little Prince" mainly talk about? It' s about _________．
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A. A
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( ) 30. Why did the father not ask his son not to do this and do that？
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A. A
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C. C
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( ) 31. What would someone learn from this passage？
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( ) 32. What may be the proper Chinese for the underlined part in the passage？
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A. A
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( ) 33. Why did Natalie Smith pay for the six cars behind her?
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( ) 34. Judy Foreman copied down the phrase because she ___ .
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( ) 36. What can we infer from the last paragraph?
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A. A
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( ) 37.The greatest river for navigation is ___________.
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( ) 38. From a dam, people can use the water for ___________.
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D. D
【单选题】
( ) 39. The water in the river is polluted because of _____________.
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A. A
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C. C
D. D
【单选题】
( ) 40. The best title of the passage is ___________.
A. Rivers in Cities B. The importance of Rivers
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A. A
B. B
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