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【单选题】
在故障分析时,对负荷的处理,以下说法不正确的的是( )。
A.
在计算起始次暂态电流时，在短路点附近的综合负荷，用次暂态电动势和次暂态电抗串联构成的电压源表示
B.
在应用运算曲线确定短路后任意时刻的短路电流的周期分量时，略去所有的负荷
C.
异步电动机的零序电抗等于零
D.
异步电动机通常接成三角形或接成不接地的星形，零序电流不能通过
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A.
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D.
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A.
existed
B.
raised
C.
arisen
D.
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A.
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B.
adults expressed less concern for their children
C.
children looked and acted like adults at that time
D.
children were not allowed to appear in family paintings
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【单选题】The purpose of the campaign is to raise the public’s_______ of the dangers of passive smoking.
A.
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B.
connection
C.
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【单选题】What is the main goal of sending human missions to Mars?A.To find out if life ever exis
A.
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D.
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【单选题】某电台为了了解国产家电的使用状况及占有率,在几个大商场向所遇见的顾客调查有关情况,以掌握初步信息,这种调查属于( )。
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任意抽样法
B.
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相关题目：
【简答题】赶秋，是湘西苗族人民的大型喜庆传统节日，在每年的哪天举行？赶秋节的主要活动是什么？
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【单选题】苗族的主要活动是()。
A.
杀年猪
B.
赛马
C.
铜鼓表演
D.
抢花炮
查看完整题目与答案
【单选题】候车室、站台、地道、天桥股道保持清请卫生。站台、地道、天桥无( )
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积水,积 冰
B.
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C.
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D.
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【单选题】Many difficulties have______ as a result of the exchange over to a new type of fuel.
A.
existed
B.
raised
C.
arisen
D.
aroused
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正确
B.
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【单选题】Children are a relatively modem invention. Until a few hundred years ago they did not exist. In medieval and Renaissance painting you see pint-sized men and women, wearing grown-up clothes and grown-u...
A.
adults were smaller and smaller now because they had many things to do
B.
adults expressed less concern for their children
C.
children looked and acted like adults at that time
D.
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查看完整题目与答案
【单选题】The purpose of the campaign is to raise the public’s_______ of the dangers of passive smoking.
A.
existence
B.
connection
C.
awareness
D.
consciousness
查看完整题目与答案
【单选题】What is the main goal of sending human missions to Mars?A.To find out if life ever exis
A.
12：What is the main goal of sending human missions to Mars? A.To find out if life ever existed there.
B.
To see if humans could survive there.
C.
To prove the feasibility of large-scale space ventures.
D.
To show the leading role 6f science in space exploration.
查看完整题目与答案
【单选题】某电台为了了解国产家电的使用状况及占有率,在几个大商场向所遇见的顾客调查有关情况,以掌握初步信息,这种调查属于( )。
A.
任意抽样法
B.
判断抽样法
C.
配额抽样法
D.
系统抽样法
查看完整题目与答案