【单选题】
[单选题]第1168题:在可燃性环境中使用金属检尺、测温和采样设备时.应该用不产生火花的材料制成,通常都采用___工具。
A. 塑料
B. 铁质
C. 铜质
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答案
C
解析
暂无解析
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[单选题]第1169题:当使用过滤式防毒面具时,空气中的毒物浓度不应超过___%。
A. 2
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[单选题]第1170题:噪声与振动较大的生产设备当设计需要将这些生产设备安置在多层厂房内时,宜将其安排在___层。
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[单选题]第1171题:高毒作业场所应当设置___色区域警示线、警示标识和中文警示说明,并设置通讯报警设备。
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[单选题]第1172题:甲烷化反应和碳二加氢反应___反应必须严格控制反应温度。
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[单选题]第1173题:设备维护保养的前提条件是___。
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[单选题]第1174题:生产装置设置围堰的目的是___。
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[单选题]第1175题:生产性粉尘中主要常见的类型是___。
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[单选题]第1176题:按压力等级区别裂解气压缩机一段排出罐属于___容器。
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[单选题]第1177题:含硫量<0.5%的原油是属于___。
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[单选题]第1178题:炉管上下温差保证在___以下减少炉管上下温差能有效地防止炉管弯曲变形和局部结焦。
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[单选题]第1179题:室内消火栓的最大间距不应超过___m。
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[单选题]第1180题:排污许可的具体办法和实施步骤由___规定。
A. 全国人大
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[单选题]第1181题: ___建立健全应急物资储备保障制度,完善重要应急物资的监管、生产、储备、调拨和紧急配送体系。
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[单选题]第1182题:全面紧急停车后.关于火炬系统的处理步骤,下列操作正确的是___。
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[单选题]第1183题:输送腐蚀性大的介质,不可以采用___。
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[单选题]第1184题:填料塔的检修质量标准下列说法错误的是___。
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[单选题]第1185题:用于制造压力容器的碳钢和低合金钢其碳含量应满足小于___%。
A. 0.25
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[单选题]第1186题: ___m的甲醇摄入量就会导致完全失明。
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[单选题]第1187题:职业病目录中,尘肺病有___种。
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[单选题]第1188题:氢氧化钠灼伤后可用2%的___洗涤中和后清水冲洗。
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[单选题]第1189题:按环保要求装置含烃类气体排放应首先___。
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[单选题]第1190题: ___就是根据事故情景,对事故可能波及范围内的相关人员进行疏散、转移和安置。
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[单选题]第1191题:储罐静置时间大多需要1~24n,至少不能少于___min,方能进行有关检测作业。
A. 20
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[单选题]第1192题:对污水进行氧化、还原、分解的处理方法是___净化。
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[单选题]第1203题:粉尘爆炸属于___爆炸。
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( ) 28. What does "The little Prince" mainly talk about? It' s about _________. A.the adult world B.the planet B -612 C.a rose and a fox D.the adventure of a young prince
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( ) 29. What is the writer's main purpose(目的)in writing this passage?    A.To tell the readers his life story.    B.To tell people what kind of person his father was.    C.To tell the readers what present he got from his father.    D. To let people know how poor he was.
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( ) 30. Why did the father not ask his son not to do this and do that?    A.Because he felt quite confident of his son.    B.Because he was born from a poor family.    C.Because he was a man of few words.    D.Because he didn't want to be much too strict with his son.
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( ) 31. What would someone learn from this passage?    A.How to live by oneself. B.How to stand on one's own feet.    C.What a good father should do. D.What the self-important is like.
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( ) 32. What may be the proper Chinese for the underlined part in the passage?    A.闲暇时光 B.学费 C.精神空虚 D.经济不足
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( ) 33. Why did Natalie Smith pay for the six cars behind her? A. She had seven tickets. B. She hoped to please others. C. She knew the car drivers well. D. She wanted to show kindness.
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( ) 34. Judy Foreman copied down the phrase because she ___ . A. thought it was beautifully written B. wanted to know what it really meant C. decided to write it on a warehouse wall D. wanted her husband to put it up in the classroom
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【单选题】
( ) 35. Who came up with the phrase according to the passage? A. Judy Foreman. B. Natalie Smith. C. Anne Herbert D. Alice Johnson.
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( ) 36. What can we infer from the last paragraph? A. People should practice random kindness to those in need. 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
C. C
D. D
【单选题】
( ) 37.The greatest river for navigation is ___________. A. the Nile B. the Amazon C. the Mekong D. the Mississippi
A. A
B. B
C. C
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【单选题】
( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
A. A
B. B
C. C
D. D
【单选题】
( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
A. A
B. B
C. C
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【单选题】
( ) 40. The best title of the passage is ___________. A. Rivers in Cities B. The importance of Rivers C. Transportation D. Natural Resources
A. A
B. B
C. C
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