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【单选题】
顺序阀在系统中作卸荷阀时,用 ( ) 型A.
内控内泄式
B.
内控外泄式
C.
外控内泄式
D.
外控外泄式
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举一反三
【单选题】Hurry up! They ______ for us now.
A.
Must waiting
B.
ought to wait
C.
must be waiting
D.
must have waited
【单选题】Up to now, the little boy is still unable to _______ to us what he meant just now.
A.
get out
B.
get across
C.
get along
D.
get about
【单选题】Hurry up! Our friends ______ for us now.
A.
wait
B.
are waiting
C.
will wait
D.
have waited
【简答题】He's left now, but productivity hasn't ______that much. A: carried on B; caught up C; picked up
【单选题】- What's up? You didn't pick up the phone just now. - I'm sorry that I dancing with music on, but it's done now.
A.
practised
B.
was practising
C.
am practising
D.
have practlised
【单选题】在两个部件之间添加配合约束的时候,哪一个部件会从先前的位置移动到满足装配关系的位置?( )
A.
都移动
B.
都不移动
C.
第一个被选择的部件
D.
第二个被选择的部件
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【简答题】He's left now, but productivity hasn't ______that much. A: carried on B; caught up C; picked up
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