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【多选题】
《春秋》中夷狄有()的区别。A.
种族上
B.
文化上
C.
地域上
D.
政治上
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【简答题】S1:Do you have a controllable or fixed pitch propeller?S2:We have controllable pitch propeller.Q:What kind of propeller does the ship have ?A. Fixed pitch propeller. B. Changeable pitch propeller . C....
【单选题】As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration.These voids are known as _...
A.
Advance
B.
Cavitation
C.
Edging
D.
Slip
【单选题】The pitch of a propeller is a measure of the（）.
A.
angle that the propeller makes with a free stream of water
B.
angle that the propeller makes with the surface of the water
C.
number of feet per revolution the propeller is designed to advance in still water without slip
D.
positive pressure resulting from the difference of the forces on both sides of the moving propeller in still water without slip
【简答题】S1:Do you have a controllable or fixed pitch propeller?S2:We have a controllable pitch propeller.Q:What type of propeller is it?A. It is a right-handed propeller. B. It is a left-handed propeller. C. ...
【简答题】S1:Do you have a variable or fixed pitch propeller?S2:We have a fixed pitch propeller.Q:What type of propeller is it?A. It's the right-handed propeller B. It's a left-handed propeller C. It's a varia...
【单选题】S1: Do you have a controllable or fixed pitch propeller? S2: We have a controllable pitch propeller. Q: What kind of propeller does the ship have?
A.
Fixed pitch propeller
B.
Changeable pitch propeller
C.
Invariable pitch propeller
D.
Inflexible pitch propeller
【简答题】S1:Do you have a controllable or fixed pitch propeller?S2:We have a fixed pitch propeller.Q:What type of propeller is it?A. It is a right-hand propeller. B. It is a left-hand propeller. C. It is a var...
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