题目

33．With the car____down halfway on the road, we had great difficulty walking home in the snow.        A．breaking   B．broken      C．to break    D．being broken 答案：A一个圆锥形碎石堆，底面半径1.5米，高1.8米，每立方米碎石重2吨，这堆碎石约重多少吨？（得数保留整数吨）