多根肋骨多处骨折发生胸壁软化后急救方法是
A．吸氧
B．止痛
C．应用胸腔闭式引流
D．肋骨牵引固定
E．加压包扎固定胸壁
参考答案：E
The number of people who were killed______more than 400,000. A great number of them ______the old people and children.[ ]
A. was; were
B. was; was
C. were; were
D. were; was
肺栓塞最常见的栓子来源于下肢深静脉血栓，其次有右心房和右心室血栓、感染性血栓、瘤栓、脂肪栓等。（）
