不属于咯血特点的是
A．咯血3天后痰中带血B．咳嗽后咯出鲜红色血C．出血前感胸闷D．鲜血经酸碱测定呈酸性E．鲜红色血中含泡沫痰
参考答案：D
连铸二冷水量的分配原则是指铸机高度从上到下逐渐减少。
Henry___________ be at home because he phoned me from the farm just now.[ ]
A. mustn't
B. isn't able to
C. may not
D. can't
