单选题A metal ring on the bottom of a block，to which the standing part of a tackle is spliced，is known as a(n)（）.AbecketBloopCswivelDeye
单选题
A metal ring on the bottom of a block，to which the standing part of a tackle is spliced，is known as a(n)（）.
A
becket
B
loop
C
swivel
D
eye
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