单选题A sheave is a（）.Agrooved wheel in a blockBline to hold a lifeboat next to the embarkation deckCpartial load of grainDsesman's knife
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
参考解析
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相关考题：
A “figure eight”knot is used to ______.A.be a stopperB.shorten a lineC.join lines of equal sizeD.keep a line from passing through a sheave
单选题A “figure eight” knot is used to（）.Abe a stopperBshorten a lineCjoin lines of equal sizeDkeep a line from passing through a sheave
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