导致血浆凝血酶原时间延长的是（）
A.Ⅷ因子缺乏
B.Ⅻ因子缺乏
C.Ⅸ因子缺乏
D.Ⅶ因子缺乏
E.DIC早期
参考答案：D
若一个椭圆长轴的长度、短轴的长度和焦距成等差数列，则该椭圆的离心率是______．
The manager decided to give the job to _____he believed had a strong sense of duty .
A．who
B．whom
C．whomever
D．whoever
