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【判断题】
纯电容电路的平均功率为零,说明纯电容将能量返还给电源。
A.
正确
B.
错误
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参考答案：
举一反三
【单选题】Throttling in the _____ line of a centrifugal pump involves the risk of the pump cavitation.
A.
suction
B.
exhaust
C.
pressure
D.
discharge
查看完整题目与答案
【单选题】With respect to centrifugal pump impellers, which of the following descriptions represents the correct centrifugal pump classification? .
A.
Single stage or multistage
B.
High pressure or low pressure
C.
Open or close coupled
D.
Horizontal or vertical
查看完整题目与答案
【单选题】对于高级编程中断控制器(APIC ),以下表述不正确的是:( )
A.
减缓与中断相关的内存总线传输压力，从而使得内存总线可用程度更高
B.
帮助核之间更好的处理来自别的核的中断
C.
APIC 接收来自处理器中断引脚的来自内部或外部I/O APIC 的中断，然后将这些中断发送过处理器核处理
D.
在多核处理器系统中，APIC 不能够接受发送核内中断（Interprocessor   interrupt  即IPI）消息
查看完整题目与答案
【判断题】变形铝合金都不能用热处理强化
A.
正确
B.
错误
查看完整题目与答案
【单选题】You start a centrifugal cargo pump to discharge cargo．The pump works for a while and then loses suction．This could be caused by ______．
A.
The pump running backwards
B.
Incomplete priming
C.
The discharge head being too high
D.
All of the above
查看完整题目与答案
【单选题】A centrifugal pump vibrates excessively during operationUpon disassembling the pump it is found that the impeller is out of balanceWithout an available spare, you should _____.
A.
drill holes through the heavy side of the impeller until it balances
B.
weld counterweights to the light side of the impeller
C.
remove metal from the heavy side by machining in a lathe
D.
acid wash and serape the heavy side until it balances
查看完整题目与答案
【判断题】在进行接触网作业时，作业组全体成员须按规定穿工作服和有高可见度的反光衣，戴安全帽，穿运动鞋
A.
正确
B.
错误
查看完整题目与答案
【单选题】Increasing the speed of a centrifugal pump will result in an increase in its capacityAnother means of increasing the capacity of a centrifugal pump is to increase the _____.
A.
diameter of the discharge piping, with all other factors remaining the same
B.
diameter of the suction piping, with all other factors remaining the same
C.
width of the impeller only
D.
diameter of the impeller
查看完整题目与答案
【判断题】变形铝合金都不能用热处理强化
A.
正确
B.
错误
查看完整题目与答案
【判断题】一般所考虑的库存控制主要是对订货和进货过程进行控制。
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】Throttling in the _____ line of a centrifugal pump involves the risk of the pump cavitation.
A.
suction
B.
exhaust
C.
pressure
D.
discharge
查看完整题目与答案
【单选题】With respect to centrifugal pump impellers, which of the following descriptions represents the correct centrifugal pump classification? .
A.
Single stage or multistage
B.
High pressure or low pressure
C.
Open or close coupled
D.
Horizontal or vertical
查看完整题目与答案
【单选题】对于高级编程中断控制器(APIC ),以下表述不正确的是:( )
A.
减缓与中断相关的内存总线传输压力，从而使得内存总线可用程度更高
B.
帮助核之间更好的处理来自别的核的中断
C.
APIC 接收来自处理器中断引脚的来自内部或外部I/O APIC 的中断，然后将这些中断发送过处理器核处理
D.
在多核处理器系统中，APIC 不能够接受发送核内中断（Interprocessor   interrupt  即IPI）消息
查看完整题目与答案
【判断题】变形铝合金都不能用热处理强化
A.
正确
B.
错误
查看完整题目与答案
【单选题】You start a centrifugal cargo pump to discharge cargo．The pump works for a while and then loses suction．This could be caused by ______．
A.
The pump running backwards
B.
Incomplete priming
C.
The discharge head being too high
D.
All of the above
查看完整题目与答案
【单选题】A centrifugal pump vibrates excessively during operationUpon disassembling the pump it is found that the impeller is out of balanceWithout an available spare, you should _____.
A.
drill holes through the heavy side of the impeller until it balances
B.
weld counterweights to the light side of the impeller
C.
remove metal from the heavy side by machining in a lathe
D.
acid wash and serape the heavy side until it balances
查看完整题目与答案
【判断题】在进行接触网作业时，作业组全体成员须按规定穿工作服和有高可见度的反光衣，戴安全帽，穿运动鞋
A.
正确
B.
错误
查看完整题目与答案
【单选题】Increasing the speed of a centrifugal pump will result in an increase in its capacityAnother means of increasing the capacity of a centrifugal pump is to increase the _____.
A.
diameter of the discharge piping, with all other factors remaining the same
B.
diameter of the suction piping, with all other factors remaining the same
C.
width of the impeller only
D.
diameter of the impeller
查看完整题目与答案
【判断题】变形铝合金都不能用热处理强化
A.
正确
B.
错误
查看完整题目与答案
【判断题】一般所考虑的库存控制主要是对订货和进货过程进行控制。
A.
正确
B.
错误
查看完整题目与答案
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