【单选题】
A sheave is a（）.
A、grooved wheel in a block
B、line to hold a lifeboat next to the embarkation deck
C、partial load of grain
D、sesman's knife
查看正确答案A、cheek B、gypsy C、sheave D、drum
搜题
更多“A sheave is a（）.”相关的问题
第2题
A、be a stopper B、shorten a line C、join lines of equal size D、keep a line from passing through a sheave
第3题
A、be a stopper B、shorten a line C、join lines of equal size D、keep a line from passing through a sheave
第4题
A、be a stopper B、shorten a line C、join lines of equal size D、keep a line from passing through a sheave
第5题
A、A.be a stopper B、B.shorten a line C、C.join lines of equal size D、D.keep a line from passing through a sheave
第6题
A、A.grooved wheel in a block B、B.line to hold a lifeboat next to the embarkation deck C、C.partial load of grain D、D.seaman's knife
第7题
A、Using a medium graphite grease as a lubricant B、Operating a winch too slow C、Using a sheave with an undersized throat D、A sheave diameter of 24 times the wire's diameter
第8题
A、The bottom block touches the top block B、The line has jumped the sheaves C、There are turns in the fall D、You have two blocks
第9题
A、all of the parts，dividing the load equally B、the hauling part because it must absorb the frictional losses of all the sheaves C、the parts in the movable block D、the standing part because it is directly connected to the weight
