10米的铁丝截去1/5后,还剩请选择CBA3|:`/E8L4t/O/v3w1n9^.W:u*S8~7g8v+r米。1M5z4P8?8J/\
A、9.81M5z4P8?8J/\
B、81M5z4P8?8J/\
C、无法确定1M5z4P8?8J/\