单项选择题
A.DL/T583B.DL/T584C.DL/T585D.DL/T586
A.1.5~1.7B.1.6~1.8C.1.7~1.9D.1.8~2.0
A.12B.24C.36D.48
A.3,13,100B.4,15,60C.4,15,80D.5,20,120
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