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【判断题】
在电信网中,星型网的可靠性低,若中心通信点发生故障,整个通信系统就会瘫痪。A.
正确
B.
错误
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【简答题】Jim Lehrer hosts The NewsHour with Jim Lehrer on PBS ( Public Broadcasting Service) and has written 18 novels, two memoirs (回忆录), and three plays. And in his spare time… What He's Working On Oh, Johnn...
【单选题】等量的Span -80(HLB4.3)与吐温-80(HLB15.0)混合后的HLB值是( )
A.
4.3
B.
6.42
C.
8.56
D.
9.65
E.
10.83
【单选题】When the writer says that Jim has a full-time job at home, he means Jim______.
A.
makes shoes in his home
B.
does his extra work at night
C.
does his own car and home repairs
D.
keeps house and looks after his children
【单选题】Jim ______already ______in this school for two years.
A.
was; studying
B.
will; study
C.
has; studied
D.
are; studying
【单选题】Jim has made many friends since he ______ to China.
A.
came
B.
comes
C.
has come
D.
will come
【单选题】我国有960万平方千米的土地,民族自治地方的行政区域面积占全国总面积的%。这体现了民族区域自治制度的什么优越性( )
A.
有利于维护国家统一和安全
B.
有利于保障少数民族人民当家作主的权利
C.
有利于促进各民族的共同繁荣
D.
有利于发展平等、团结、互助的社会主义民族关系
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