单选题A block and tackle is “rove to advantage”. This means that the（）.Ablocks have been overhauledBhauling parts of two tackles are attachedChauling part leads through the movable blockDhauling part leads through the standing block
单选题
A block and tackle is “rove to advantage”. This means that the（）.
A
blocks have been overhauled
B
hauling parts of two tackles are attached
C
hauling part leads through the movable block
D
hauling part leads through the standing block
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