A0.8m;0.5m/s;0.7m;50%
B0.8m;0.7m/s;0.5m;50%
C0.8m;0.5m/s;0.5m;60%
D0.8m;0.5m/s;0.5m;50%
答案: <查看本题扣1积分>
查看答案
答案不对?请尝试站内搜索