单项选择题
A.120~150m B.100m C.200m
A.10 B.4 C.5~8
A.10 B.20 C.15
A.7/2.2,7/2.4,7/3.0 B.7/2.0,7/2.4,7/3.0 C.7/2.2,7/2.6,7/3.0
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