单选题The square knot is used for（）.Aforming temporary eyes in linesBjoining two lines of equal sizeCkeeping line from unlaying or frayingDjoining two lines of different size
单选题
The square knot is used for（）.
A
forming temporary eyes in lines
B
joining two lines of equal size
C
keeping line from unlaying or fraying
D
joining two lines of different size
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