在一次“飞车过黄河”的表演中，汽车在空中经最高点后在对岸着地，已知汽车从最高点至着地点经历时间为0.8s，两点间的水平距离为32m，忽略空气阻力，g取10m/s²，则最高点与着地点间的高度差为______m．汽车在最高点时的速度（水平）为______m/s．

Construction is expanding all over China, no doubt many materials will be needed at a very big amount in future.

A．China, no doubt many materials will be needed for a very big amount

B．China, no doubt many materials will be needed in a very big amount

C．China; no doubt many materials will be needed in large amounts

D．China; no doubt many materials will be needed for large amounts