题目内容
(请给出正确答案)
[主观题]
_____ thrust and resistance equal each other, the ship always travels at a constant speed.
A.As long as
B.As far as
C.As well as
D.Unless
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A.As long as
B.As far as
C.As well as
D.Unless
第1题
A.length increases
B.cross-sectional area increases
C.temperature increases
D.percent of metallic purities increases
第2题
A.control air system
B.forced draft air system
C.supply air system
D.ships service air system
第3题
A.nuts
B.bolts
C.coil springs
D.stuffing boxes
第4题
A.Feed-water heater internal tube surfaces
B.Internal distillate cooler tubes
C.Flash chamber vertical surfaces
D.Distilling condenser tubes
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