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【单选题】
在回油节流调速回路中,节流阀处于节流调速工况,系统的泄漏损失及溢流阀调压偏差均忽略不计.。当负载F增加时,泵的输入功率()A.
增加
B.
减少
C.
基本不变
D.
可能增加也可能减少
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举一反三
【简答题】气门传动组的作用是按规定的( )定时地驱动( ),并保证气门有足够的( )和适当的( )。
【单选题】If you have a problem _____ your composition, you had better ask your teacher ______.
A.
in; on some advice
B.
for; for some advices
C.
on; some advice
D.
with; for some advice
【简答题】气门传动组的作用是按规定的( )定时地驱动( ),并保证气门有足够的( )和适当的( )。
【多选题】Nowadays many documents are used in international cargo transportation，some of the documents can be transferred to the third parties and some can not be transferred to the third parties．Please point o...
A.
insurance policy can be transferred to the third parties
B.
insurance policy can not be transferred to the third parties
C.
sea waybill can be transferred to the third parties
D.
sea waybill can not be transferred to the third parties
【单选题】If you have some difficulties ____ your grammar, you had better ask your teacher ____.
A.
in; on some advice
B.
for; for some advices
C.
on; some advice
D.
with; for some advice
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