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【简答题】某三相异步电动机，极对数p = 2，定子绕组三角形联结，接于50 Hz、380V 的三相电源上工作，当负载转矩为91 N·m 时，测得线电流为30 A，P1= 16 kW，n =1470 r/min，求该电动机带此负载运行时的效率为 %（保留一位小数）。
【单选题】Which of the following is good for the economy according to Eliot Spitzer?
A.
Law enforcement approach.
B.
Decisions open to question.
C.
The honour code among CEOs.
D.
Board oversight and self-regulation.
【单选题】For the economy to be in equilibrium , income must equal expenditure.
A.
good condition
B.
balance
C.
progress
D.
equation
【单选题】Which of the following have to be in equilibrium for the economy to be in equilibrium?
A.
the money market only
B.
the goods market only
C.
the output and assets markets
D.
the savings and investment markets
E.
the goods and output markets
【单选题】Economic growth did not make it more flexible for the home economy to obtain the new goods and services because _____.
A.
the family was not efficient in production
B.
it was illegal for the home economy to produce them
C.
it could not supply them by itself
D.
the market for these goods and services was limited
【单选题】60032根据标准图集《预制混凝土剪力墙外墙板》(15G365-1)中夹心墙板模板图中的主视图,可知墙板的相关尺寸,其中错误的是( )。
A.
墙板长度
B.
墙板高度
C.
窗孔的长和高度
D.
墙板厚度
【单选题】The worst thing that could happen for the president and the Democrats is for the economy to continue to ( ) and they get blamed for it.
A.
worse
B.
deteriorate
C.
detect
D.
adverse
【简答题】某三相4极笼型异步电动机，其定子绕组星形联结，该电动机的技术数据为：P N =11kW，U N1 =380V，n N =1430r/min，λ m =2.2，用它来拖动T z =0.8T N 的恒转矩负载运行。求：
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