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【单选题】
四显示自动闭塞区段，特快旅客列车由车站通过时，进入前方闭塞分区的凭证为出站信号机的（）灯光。A.
白色
B.
绿黄色或绿色
C.
黄色
D.
双黄色
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皮皮学刷刷变学霸
举一反三
【简答题】将下面程序补充完整。 public class PowerCale { public static void main(String[] args) { double x=5.0； System.out.println(x+"to the power 4 is"+power(x,4))； System.out.println("7.5 to the power 5 is"+power...
【单选题】Judicial review refers to the power of the federal courts to __________.
A.
make the final interpretation of the Constitution.
B.
declare a legislative or executive act invalid if it violates the Constitution.
C.
extend the judiciary power into the realm of the executive branch.
D.
forbid the federal government from contracting with employers who permanently replaced striking employees.
【简答题】一铁芯线圈接在10V直流电压源上，测得电流为5A。如将其接在100V正弦交流电源上，测得功率为l 00W，cosψ=0．5，在忽略铁芯漏磁通时，求铁损PFe。
【多选题】在交流电路中,铁芯线圈的铁芯对线圈的电性能的影响为( )
A.
增大线圈的感抗
B.
使线圈感抗不是常数
C.
由于铁芯发热，线圈功率损耗增加
D.
若电压为正弦波，则电流为非正弦波
E.
使线圈的电阻增大。
【单选题】In the case of the far-left government，what will happen to the power of the government
A.
The power of government becomes larger
B.
The power of government becomes weaker
C.
No change at all
D.
As appropriate, and in different situations the changes are different
【简答题】Power output by the clutch is mainly driven by the formation of tangency between one or more drive components connected to the engine crankshaft and others connected to the power input shaft.
【单选题】The two men talked in a low voice, ____nobody heard what they were saying.
A.
so that
B.
as if
C.
because
D.
when
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