单项选择题
A.一人一跳 B.多人下跳 C.两人下跳 D.无要求
A.2.0 B.4.0 C.6.0 D.8.0
A.6.0 B.8.0 C.10.0 D.12.0
A.150.0 B.160.0 C.170.0 D.180.0
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