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【单选题】
( )由于结构简单、运行可靠、维护方便和价格便宜,是所有电动机中应用最广泛的一种。A.
异步电动机
B.
同步电动机
C.
直流电动机
D.
变频电动机
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皮皮学刷刷变学霸
举一反三
【单选题】In Thailand, you shouldn't ________. [ ]
A.
go out with your hair wet
B.
point to anything with your foot
C.
touch a child on the head
D.
eat with your left hand
【单选题】下列说法正确的是( ) 。
A.
．收入是指企业销售商品、提供劳务及让渡资产使用权等活动中形成的经济利益的总流入
B.
．所有者权益增加一定表明企业获得了收入
C.
．狭义的收入包括营业外收入
D.
．收入按照性质不同，分为销售商品收入、提供劳务收入和让渡资产使用权收入等
【简答题】板中通常布置三种钢筋:()、()和()
【简答题】A:I am sorry to have__1___ all of you waiting . I was __2__ by something __3____ . B : You are not late , Mr . Thomas . There're still 15____4____ to go . Mr . White has just called you . A: What did ...
【单选题】Mr. Smith is still not so familiar with the city because it was only two months ago, in March, ____ he started working here. [ ]
A.
before
B.
when
C.
that
D.
which
【简答题】用括号内所给动词的适当形式填空。 1.－Is everybody here? －No, sir. Jim _________(not arrive) yet. He is still on the way. 2.You can come over now, but 10 minutes is all I can spare _________(talk) with you. 3. I’m sorr...
【单选题】光敏电阻、发光二极管和驻极体话筒三种元件中,有正负极性的元件是( )。
A.
光敏电阻
B.
光敏电阻、发光二极管和驻极体话筒
C.
发光二极管和驻极体话筒
D.
都没有
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