纤维蛋白缺乏症的实验室检查,下列哪一组是正确的KPTT凝血酶原时间凝血酶时间()
A.延长延长正常
B.延长延长延长
C.正常延长正常
D.正常正常正常
E.延长正常正常
参考答案:B
有机物的干燥方法有几种?化学干燥剂的干燥原理有哪两类?
Nowadays ______people are out of work. [A] million of [B] millions of [C] million