单选题The rolling hitch could be used to（）．Ajoin two lines of different sizesBjoin two lines of equal sizesCadd strength to a weak spot in a lineDact as a stopper to transfer a line under strain
单选题
The rolling hitch could be used to（）．
A
join two lines of different sizes
B
join two lines of equal sizes
C
add strength to a weak spot in a line
D
act as a stopper to transfer a line under strain
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