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【判断题】
减压阀在液压系统中起调压作用，正常工作的出口压力保持恒定，不工作时阀内回路处于常闭状态()A.
正确
B.
错误
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【单选题】The kings had the pyramids built to keep their bodies until ______.
A.
they came home
B.
they became alive
C.
they die
D.
they were on show in museums
【单选题】他励直流电动机要多次启动和停止，注意每次启动直流电动机时，都要将( )调至最小，电枢调节电阻Rpa调至最大；先接通励磁电源开关，再接通电枢电源开关。
A.
励磁电源开关
B.
励磁调节电阻Rpf
C.
电枢电源开关
D.
电枢调节电阻Rpa
【单选题】某企业2019年11月发生以下经济业务:车间管理部门应分摊的固定资产折旧30万元;因收发差错造成的存货短缺净损失10万元;机器设备日常维修支出40万元;办公楼应摊销的土地使用权300万元。该企业11月份应计入管理费用的金额是( )万元。
A.
380
B.
350
C.
310
D.
50
【简答题】(四川大学2004年考研试题)已知某电路的基本回路矩阵如下： (1)试写出该电路与Bf相同树的基本割集矩阵Qf； (2)当树支电压为UT=[6 1 3 2 2]TV时，求连支电压。
【单选题】Many European Kings felt happier after Napoleon______from the scene.
A.
disappeared
B.
had disappeared
C.
was disappearing
D.
would disappear
【单选题】他励直流电动机要多次启动和停止，注意每次启动直流电动机时，都要将励磁调节电阻Rpf调至最小，电枢调节电阻Rpa调至最大；先接通励磁电源开关，再接通( )。
A.
励磁电源开关
B.
励磁调节电阻Rpf
C.
电枢电源开关
D.
电枢调节电阻Rpa
【单选题】The Egyptian kings had pyramids __ for them on the west bank of the river
A.
build
B.
to build
C.
building
D.
built
【单选题】Why do "the kings and queens" have to wait in Upside Down ?
A.
because he has few days to live
B.
because he cannot live longer than kings and queens
C.
because he thinks it is more important to chase the girl than to know who the kings and queens are
D.
because he has more important guests to see than kings and queens
【单选题】Whom do they consult?
A.
The spirits of ancient Javanese kings.
B.
Wall Ullah.
C.
Old Kings.
D.
Carnegie.
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