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【单选题】
螺旋桨的小,则()。A.
推力越小舵效越差
B.
推力越大、舵效越好
C.
推力越小、舵效越好
D.
推力越大、舵效越差
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皮皮学刷刷变学霸
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【简答题】我国《商标法》除保护商品商标外还保护 ( )。 A．服务商标 B．立体商标 C．气味商标 D．集体商标
【单选题】—Your father is cleaning the car. Is Tom helping? — . He is playing football. [ ]
A.
Yes , he is
B.
No , he isn't
C.
Yes , he has
D.
No, he doesn't
【单选题】What a dangerous scene! A car has missed the boy playing on the roadside________ only an inch. [ ]
A.
within
B.
for
C.
by
D.
at
【单选题】---A car knocked Jack down while he was playing on his way home. ---Really? We are told in the street.
A.
not playing
B.
not play
C.
don’t play
D.
not to play
【简答题】全面预算体系包括______、______和______三大组成部分；其中______是编制全面预算的基础。
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