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【多选题】
汽车排放的污染物主要来自哪些部位?()
A.
从发动机排气管排出的废气,占汽车总排放的65-85%。
B.
从发动机曲轴箱内排出的有害气体。占汽车总排放污染物的20%左右。
C.
从汽车供油系统的燃料油中蒸发产生的有害气体约为5-10%。
D.
从汽车散热系统的散热液中蒸发产生的有害气体约为20%左右
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【单选题】一只220V/40W的灯泡正常发光25h,其耗电( )KW.h
A.
2
B.
20
C.
1
D.
10
【简答题】完形填空。 My name is Lily. My father is a teacher. His students love him a lot because he is funny. I love him, too, but I think he can be 'foolish' 1 . Once we moved into a new house and had to go shoppi...
【单选题】一只220V/40W的灯泡正常发光25h,其耗电()kW·h
A.
2
B.
20
C.
1
D.
10
【单选题】“ 220V 40W ”的灯泡正常发光 25h ,耗电( )度。
A.
2
B.
20
C.
1
D.
10
【简答题】创建一个视图文件ygbm,包含employees(别名emp)表的emp_name,列,departments(别名dep)表的dep_name列。两表均包含dep_id列,请写出代码。
【简答题】创建一个视图文件OS,包含orders(别名O)的orderid,customerid列,shippers(别名S)的companyname,phone列。O.shipvia=S.shipperid,请写出代码。
【简答题】创建一个视图文件OP,包含products(别名P)的productname列,[order details](别名O)的unitprice,quantity列。两表均包含productrid列,请写出代码。
【简答题】创建一个视图文件PS,包含products(别名P)的productid,productname列,suppliers(别名S)的companyname,address列。两表均包含supplierid列,请写出代码。
【单选题】Which of the following gives the best definition for metonymy?
A.
It is a figure of speech in which a term for a part of something refers to the whole of something or vice versa.
B.
It is a figure of speech in which the name of one thing is used for that of another of which it is an attribute or with which it is associated.
C.
It is a figure of speech in which one thing is mentioned to stand for another in that there is some similarity between them.
D.
It is a figure of speech in which personal qualities are attributed to nonhuman things or abstract notions.
【单选题】“220V 40W”的灯泡正常发光25h。耗电( )度。
A.
2
B.
20
C.
1
D.
12
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