A.前B.后C.上D.下
A.前B.后C.左D.右
A.點(diǎn)與點(diǎn)之間需跳躍移動(dòng)B.點(diǎn)與點(diǎn)之間需跨步移動(dòng)C.點(diǎn)與點(diǎn)之間移動(dòng),重心應(yīng)降低D.點(diǎn)與點(diǎn)之間移動(dòng),重心應(yīng)升高