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【单选题】
关于电场,下列说法正确的是( )A.
电场的电场线一定是一簇等间距的平行直线
B.
如果某空间有两处电场强度相同，则这个空间中的电场一定是电场
C.
如果某空间中的电场线是直线，则这个空间中的电场一定是电场
D.
以上说法均不正确
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举一反三
【单选题】Money spent on advertising is money spent as well as any I know of. It serves directly to assist a rapid distribution of goods at reasonable prices, thereby establishing a firm home market and so maki...
A.
he is firmly familiar with the cost of advertising
B.
everybody know well that advertising is money consuming
C.
advertising costs money like everything else
D.
it is worthwhile to spend money on advertising
【单选题】. He spent more than twice as much time on the problem _____ I spent on it .
A.
than
B.
as
C.
less
D.
so
【单选题】已知直线 过点(-3,1),且与直线x+4y-2=0平行,则直线 的方程为()
A.
x-4y-4=0
B.
4x-y-4=0
C.
4x-y+13=0
D.
x+4y-1=0
【单选题】______掌握着世界上最为先进的搜索引擎技术,也使中国成为美国、俄罗斯、和韩国之外,全球仅有的4个拥有搜索引擎核心技术的国家之一。
A.
百度
B.
网易
C.
搜狐
D.
腾讯
【单选题】I spent five yuan on this pen. =' I' spent five yuan buying this pen.
A.
by
B.
in
C.
for
D.
on
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