【单选题】
沟(槽)开挖深度达到( )及以上时，应采取措施防止土层塌方。
A. 1.0m
B. 1.5m
C. 1.8m
D. 2.0m
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答案
B
解析
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沟(槽)开挖时，应将路面铺设材料和泥土分别堆置，堆置处和沟(槽)之间应保留通道供施工人员正常行走。在堆置物堆起的( )不得放置工具、材料等器物。
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在下水道、煤气管线、潮湿地、垃圾堆或有腐质物等附近挖沟(槽)时，应设监护人。在挖深超过( )m的沟(槽)内工作时，应采取安全措施，如戴防毒面具、向沟(槽)送风和持续检测等。监护人应密切注意挖沟(槽)人员，防止煤气、硫化氢等有毒气体中毒及沼气等可燃气体爆炸。
A. 1.0
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C. 1.8
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电缆井、电缆隧道内作业过程中应用气体检测仪检查井内或隧道内的( )是否超标，并做好记录。
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链条(手扳)葫芦使用前应检查吊钩、链条、转动装置及制动装置，吊钩、链轮或倒卡变形以及链条磨损达直径的( )时，禁止使用。
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长期停用或新领用的电动工具应用绝缘电阻表测量其绝缘电阻，若带电部件与外壳之间的绝缘电阻值达不到( )MΩ，应禁止使用。
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安全工器具使用前，应检查确认( )部分无裂纹、无老化、无绝缘层脱落、无严重伤痕等现象以及固定连接部分无松动、无锈蚀、无断裂等现象。
A. 绝缘
B. 传动
C. 固定
D. 外壳
【单选题】
接地线的两端夹具应保证接地线与导体和接地装置都能接触良好、拆装方便，有足够的( )，并在大短路电流通过时不致松脱。
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安全工器具宜存放在温度为( )、相对湿度为80%以下、干燥通风的安全工器具室内。
A. -10～+35℃
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C. -15～+35℃
D. -15～+30℃
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使用中的氧气瓶和乙炔气瓶应( )固定放置，氧气瓶和乙炔气瓶的距离不得小于5m，气瓶的放置地点不准靠近热源，应距明火lOm以外。
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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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【单选题】
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( ) 30. Why did the father not ask his son not to do this and do that？
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D．Because he didn't want to be much too strict with his son．
A. A
B. B
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D. D
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( ) 31. What would someone learn from this passage？
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A. A
B. B
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【单选题】
( ) 32. What may be the proper Chinese for the underlined part in the passage？
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A. A
B. B
C. C
D. D
【单选题】
( ) 33. Why did Natalie Smith pay for the six cars behind her?
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A. A
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【单选题】
( ) 34. Judy Foreman copied down the phrase because she ___ .
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【单选题】
( ) 35. Who came up with the phrase according to the passage?
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A. A
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【单选题】
( ) 36. What can we infer from the last paragraph?
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B. People who receive kindness are likely to offer it to others.
C. People should practice random kindness to strangers they meet.
D. People who receive kindness are likely to pay it back to the giver.
A. A
B. B
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【单选题】
( ) 37.The greatest river for navigation is ___________.
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【单选题】
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【单选题】
( ) 39. The water in the river is polluted because of _____________.
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A. A
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【单选题】
( ) 40. The best title of the passage is ___________.
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A. A
B. B
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D. D
