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Mr Smith gave his wife money every Friday evening. His wife always spent it all the next Wednesday, so that for the next three days she had no money to spend at all. One day Mr Smith asked her,' But how did you spend all that money?' She answered, 'I don't know . 'So one Friday evening, Mr Smith gave her money together with an exercise book and a pencil. He said to his wife ,'Please write down how you spend the money . 'Next Tuesday, his wife had no money again. Mr Smith took the exercise book to see how she had spent it. 'I have done what you told me ,'she said gladly. She had written 'Friday, I got 18 pounds from Mr Smith. 'on the first page, and on the second page, she wrote ,'Tuesday, I have spent it all. ' 小题1:Mrs Smith always spent all the money ____. A.the next day B.in four days C.in a week D.on next Wednesday 小题2:Mr Smith gave his wife an exercise book and a pencil and asked her____ A.to do homework B.to have a look C.to write down how she spent the money D.to draw a picture on it 小题3:Mrs Smith was ____ to do what Mr Smith asked her to . A.happy B.sad C.sorry D.excited 小题4:Mr Smith gave his wife money ____ a week. A.once B.twice C.three times D.four times 小题5:The story tells us that Mrs Smith was not very ____. A.glad B.tall C.careful D.Good
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【判断题】液体化学品着火属于B类火灾
A.
正确
B.
错误
【单选题】当发电机和主变压器为单元接线或扩大单元接线时,则高压厂用工作电源从该单元( )引接。
A.
发电机的出口
B.
主变压器的高压侧
C.
主变压器的低压侧
D.
升高电压母线
【多选题】发电机-变压器单元接线的特点为( )。
A.
接线简单清晰,电气设备少,配电装置简单,投资少,占地面积小
B.
不设发电机电压母线,发电机或变压器低压侧短路时,短路电流小
C.
操作简便,降低故障的可能性,提高了工作的可靠性,继电保护简化
D.
任意元件故障或检修全部停止运行,检修时灵活性差
【单选题】马克思指出,巴黎公社“所采取的各项措施,只能显示出走向属于人民,由人民掌权的政府的趋势。”这主要表现在( ) 1 司法和立法机构的建设上 2公职人员的产生方式上 3逃亡资本家工厂的管理上 4与广大农民的联系上
A.
①②③
B.
②③④
C.
①②③④
D.
①③④
【简答题】下列知识归纳有错误的一组是(  ) A.物质组成 B.化学与生活 ●苏打、纯碱-----化学式都是Na 2 CO 3 ●蔗糖、葡萄糖、淀粉----都属于糖类物质 ●酒精、汽油、液化气--是易燃物 ●油锅着火、电器着火--用水浇灭 C.物质与变化 D.食品与健康 ●煤的干馏、汽油燃烧--是化学变化 ●碳铵与草木灰混用--产生氨气而降低肥效 ●重金属中毒--喝鸡蛋清解毒 ●人体缺碘--多吃海带、紫菜、...
【单选题】下列关于留存收益筹资的表述中,错误的是( )
A.
留存收益筹资可以维持公司的控股权结构
B.
留存收益筹资不会发生筹资费用,因此没有资本成本
C.
留存收益来源于提取的盈余公积金和留存于企业的利润。
D.
留存收益筹资有企业的主动选择,也有法律的强制要求。
【单选题】某水电站装有4台机组4台主变,采用发电机一变压器之间单元接线,发电机额定电压为15.75kV,1号和3号发电机端装有厂用电源分支引线,无直馈线路,主变压器高压侧所连接的220kV屋外配电装置是双母线带旁路接线,电站出线4回,初期2回出线,电站属于停机频繁的调峰水电厂。若水电站每台发电机端均装避雷器,1号和3号厂有电源分支采用带金属外皮的电缆段引接,电缆段长40m,请说明主变低压侧避雷器应按下列哪项...
A.
需装设避雷器
B.
需装设二组避雷器
C.
需装设一组避雷器
D.
无须装设避雷器
【多选题】发电机-变压器单元接线的特点为
A.
接线复杂,电气设备多,占地面积大
B.
设置发电机电压母线,发电机或变压器低压侧短路时,短路电流大
C.
操作简便,降低故障的可能性,提高了工作的可靠性,继电保护简化
D.
任一元件故障或检修全部停止运行,检修时灵活性差
【单选题】发电机-变压器单元接线,变压器高压侧母线上短路时,短路电流冲击系数应取( )。
A.
2
B.
1.8
C.
1.9
【简答题】map函数会根据提供的函数对指定的序列做【】。
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