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【简答题】
采用了数据库技术完整的计算机系统称为____。它通常包括____、____、____、____和____五大部分。
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参考答案:
举一反三
【单选题】Comma Splice/Run-on Sentences/Sentence Fragments Decide which one of the following choices is correct. There was an accident on Route 38 last night, several people got hurt.
A.
There was an accident on Route 38 last night; several people got hurt.
B.
There was an accident on Route 38 last night. Several people got hurt.
C.
Because was an accident on Route 38 last night several people got hurt.
D.
Both A and B are correct.
【简答题】There is an old story telling about a woman whose only son died in an accident. In her 26 , she went to the wise man that is always 27 for his wisdom in her town and said, “What advice or what 28 ways...
【单选题】将编译好的 .class类文件在虚拟机上运行的程序为( )。
A.
Appletviewer
B.
Javadoc
C.
Java
D.
Javac
【简答题】如图所示,三相异步电动机的机械特性与恒转矩负载的机械特性(转矩大小不随转速变化)交于A、B两点(T L 等于额定电磁转矩T N ),与风机负载的机械特性(转矩近似与转速的平方成正比)交于C点。不计空载转矩,试问:在A、B、C三点中,电动机能在哪些点稳定运行?能在哪些点长期稳定运行?
【判断题】三相异步电动机的转速n与转矩T之间的关系n=f(T)称为电动机的固有机械特性。
A.
正确
B.
错误
【单选题】—Why is the classroom so dirty? —Sorry,sir. It yesterday, We forgot to do it.
A.
doesn’t clean
B.
didn’t clean
C.
isn’t cleaned
D.
wasn’t cleaned
【单选题】与固有机械特性相比,人为机械特性上的最大电磁转矩减小,临界转差率没变,则该人为机械特性是三相异步电动机的( )。
A.
降低电压的人为机械特性
B.
定子串接电阻的人为机械特性
C.
转子串接电阻的人为机械特性
D.
改变频率的人为机械特性
【判断题】行前说明会通常选在团队正式出发前一周左右召开,届时全陪务必参加,不能以任何理由推脱。()
A.
正确
B.
错误
【判断题】行前说明会通常选在团队正式出发前一周左右召开,届时全陪务必参加,不能以任何理由推脱。
A.
正确
B.
错误
【单选题】It is reported______there was an accident in town yesterday.
A.
where
B.
which
C.
here
D.
that
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