凝血酶原时间异常表明下列凝血因子可能有缺陷的是().
A.Ⅰ、Ⅱ、Ⅴ、Ⅶ、Ⅸ
B.Ⅰ、Ⅱ、Ⅴ、Ⅶ、Ⅹ
C.Ⅱ、Ⅶ、Ⅸ、Ⅹ
D.Ⅶ、Ⅸ、Ⅹ、Ⅺ
E.Ⅲ、Ⅴ、Ⅶ、Ⅺ
参考答案:B
Wang Ping hesitated for ___ before he ___ to the question.
A.sometime, replied
B.some time, replied
C.sometimes, answered
D.some time, answered
高压弯头主要作用是调整管线接口的距离。()