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【单选题】
电路如图， 答案正确的是（    ）。
A.
U、I为关联参考方向，  I=3A ;
B.
U、I为关联参考方向，  I=-3A;
C.
U、I为非关联参考方向，I=3A;
D.
U、I为非关联参考方向，I=-3A;
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【单选题】Routine maintenance of lead acid batteries should include _____.
A.
keeping the terminals clean
B.
coating cable connections with petroleum jelly
C.
maintaining a trickle charge
D.
All of the above
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【单选题】I hereby request permission ______ the ship’s main engine for routine maintenance.
A.
immobilize
B.
to immobilize
C.
immobilization
D.
Immobilizing
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【单选题】Which of the routine maintenance procedure listed is required for starting air receivers?
A.
Frequent draining of accumulated moisture
B.
Frequent testing of relief valves
C.
A close watch on temperature to prevent fluctuations in pressure
D.
Frequent cleaning to re move oil and foreign matter
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【单选题】在密闭容器上装有U形水银测压计,如图所示,其中1、2、3点位于同一水平面上,其压强关系为:
A.
P1>P2>P3
B.
P1=P2=P3
C.
P1
D.
P2
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【单选题】Routine Maintenance means( ).
A.
to complete the task called for on the work order
B.
to inspect the equipment, prevent small problems before they become larger ones
C.
to save energy
D.
to manage waste
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【简答题】Here is a list of routine maintenance you should be performing on your computer each and every month. If you use your computer on a daily basis or surf the net everyday, you should perform. this maint...
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【判断题】以实际的经济业务事项或者资料进行会计核算,会使会计信息质量出现失真。
A.
正确
B.
错误
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【单选题】Which of the routine maintenance procedures listed is required for starting air receivers?
A.
over-speeding
B.
overload
C.
low exhaust temperature
D.
high crankcase pressure
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【单选题】I hereby request permission to ______ the ship hull for routine maintenance．
A.
put paint on
B.
apply paint onto
C.
oil
D.
paint
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【单选题】Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected? .
A.
Correct the cause of the scoring and repair the sleeve or replace with a new one
B.
Reassemble the unit and provide more water leak off for proper lubrication
C.
Check for parallel alignment of the sleeve radial faces to the sleeve bores
D.
Reassemble the unit and adjust the governor to obtain a slower speed
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相关题目：
【单选题】Routine maintenance of lead acid batteries should include _____.
A.
keeping the terminals clean
B.
coating cable connections with petroleum jelly
C.
maintaining a trickle charge
D.
All of the above
查看完整题目与答案
【单选题】I hereby request permission ______ the ship’s main engine for routine maintenance.
A.
immobilize
B.
to immobilize
C.
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D.
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【单选题】Which of the routine maintenance procedure listed is required for starting air receivers?
A.
Frequent draining of accumulated moisture
B.
Frequent testing of relief valves
C.
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D.
Frequent cleaning to re move oil and foreign matter
查看完整题目与答案
【单选题】在密闭容器上装有U形水银测压计,如图所示,其中1、2、3点位于同一水平面上,其压强关系为:
A.
P1>P2>P3
B.
P1=P2=P3
C.
P1
D.
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【单选题】Routine Maintenance means( ).
A.
to complete the task called for on the work order
B.
to inspect the equipment, prevent small problems before they become larger ones
C.
to save energy
D.
to manage waste
查看完整题目与答案
【简答题】Here is a list of routine maintenance you should be performing on your computer each and every month. If you use your computer on a daily basis or surf the net everyday, you should perform. this maint...
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【判断题】以实际的经济业务事项或者资料进行会计核算,会使会计信息质量出现失真。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the routine maintenance procedures listed is required for starting air receivers?
A.
over-speeding
B.
overload
C.
low exhaust temperature
D.
high crankcase pressure
查看完整题目与答案
【单选题】I hereby request permission to ______ the ship hull for routine maintenance．
A.
put paint on
B.
apply paint onto
C.
oil
D.
paint
查看完整题目与答案
【单选题】Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected? .
A.
Correct the cause of the scoring and repair the sleeve or replace with a new one
B.
Reassemble the unit and provide more water leak off for proper lubrication
C.
Check for parallel alignment of the sleeve radial faces to the sleeve bores
D.
Reassemble the unit and adjust the governor to obtain a slower speed
查看完整题目与答案