2013年4月20清晨，雅安芦山发生强烈地震，距灾区105k

更新 2022-09-03
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2013年4月20清晨，雅安芦山发生强烈地震，距灾区105km的某驻军部队接到命令立即驱车赶往灾区救援．出发50min后中途遇山体滑坡道路阻断，经2h抢通道路，继续前进40min到达指定地点．救援部队全程平均速度应为（）

A．126km/h

B．70km/h

C．52.5km/h

D．30km/h

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