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Dear Abby, I'm a helpless mother. My son Tom is 15 years old. I find that the older he grows, the less we talk. I feel very sad and I really need help. My first problem is about his hobbies. He spends almost all his spare time on computer games. When he gets home, he always turns on the computer and closes the door. I'm getting worried about him, especially when his English teacher tells me he always gets low marks in the English exams. Second, he likes new technology, but I don't have enough money and I can't afford all the things he wants. Recently, I've found that he is always alone. I've never seen him talking to his friends on the phone or going out with anyone on weekends. That is the last problem I have. What should I do to help him? Please give me some advice. A helpless mother 小题1:The helpless mother has problems. A.two B.three C.four D.five 小题2:Tom for almost all his spare time at home. A.plays computer games B.talks with his mother C.does his homework D.practises typing (打字) 小题3:From the passage we know that Tom's mother . A.is not worried about Tom B.feels very happy C.is not rich D.likes new technology 小题4:The helpless mother asks Abby to A.play with Tom B.talk to Tom C.buy what Tom wants D.give her some advice 小题5:Which of the following is TRUE about Tom? A.He is 14 years old. B.He is not good at English. C.He often phones to his friends. D.He likes going out on weekends.
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【单选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006 规定:城镇燃气设施动火作业区内应保持空气流通。在通风不良的空间内作业时,应采用( )进行强制通风。
A.
工业风扇
B.
排风机
C.
鼓风机
D.
防爆风机
【单选题】《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006 规定:燃气设施和用气设备的维护和检修工作,必须由具有( )的单位及专业人员进行。
A.
国家相应资质
B.
相关上岗资质人员
C.
维修经验
D.
维修设备
【单选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006 规定:城镇燃气设施不停气动火作业,动火作业引燃的火焰,必须有可靠、有效的方法( )。
A.
对其监控
B.
防止灭火
C.
将其扑灭
D.
以上都对
【单选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006 规定:燃气设施停气、降压、动火及通气等生产作业,在作业中应对放散 点进行( )。
A.
监护
B.
定时巡视
C.
封闭
D.
检查
【单选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006 规定:城镇燃气设施在动火操作过程中应严密监测作业区内可燃气体浓度及管道内压力的变化,动火作业区内可燃气体浓度应小于其爆炸 ( )。
A.
下限的 20%
B.
下限的 10%
C.
上限的 20%
D.
上限的 10%
【单选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006规定:城镇燃气设施停气动火作业燃气管道内积有燃气杂质时,应采取( )。
A.
有效措施进行隔离
B.
置换的办法排除
C.
加强监控的措施施工
D.
以上都对
【判断题】某手性卤代烷与 NaOH 在水 - 乙醇溶液中进行反应,有 80% 产物的构型发生瓦尔登转化,该反应属于 SN1 历程。
A.
正确
B.
错误
【单选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006规定:燃气设施维护、检修或抢修作业完成后,应进行( ),合格后方可进行置换作业。
A.
气密检查
B.
全面检查
C.
探伤检查
D.
全面恢复
【单选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006规定:城镇燃气设施动火作业现场,应划出_____,并应设置_____和______。
A.
警戒区、护栏、警示标志
B.
作业区、护栏、提示标志
C.
作业区、护栏、警示标志
D.
物料区、护栏、警示标志
【多选题】根据《城镇燃气设施运行、维护和抢修安全技术规程》CJJ51-2006 规定:燃气设施运行记录应包括下列那些内容:()
A.
巡查周期、时间、地点(范围)、异常情况、处理方法和记录人等
B.
违章、险情的处理情况记录
C.
配合城市其他施工工程对燃气管线的监护记录(包括管位、护坡等保护措施)
D.
燃气管网运行流速
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