产后凝血功能障碍性出血的处理方法是()
A．立即注射抗生素
B．纠正休克
C．补充血容量
D．补充凝血因子
E．去除病因
参考答案：B, C, D, E
50kg/m钢轨改道、更换垫板或冻害垫板作业时，在一股钢轨上，一处连续起下道钳或卸掉扣件数量不超过（）轨枕头。
A.8个
B.7个
C.6个
D.5个
An analyst does research about future transaction. In general, which of the following is least likely to prefer for an investor to terminate a future contract at expiration（）
A. Delivery.
B. Closeout.
C. Cash settlement.
