孕期凝血因子下降的是（）
A.Ⅷ
B.Ⅶ
C.Ⅹ
D.Ⅸ
E.Ⅻ
参考答案：E
100千克黄豆可以榨油13千克，照这样计算，要榨豆油6.5吨，需黄豆多少吨？
There is an hour to go. Could we sit somewhere to have a drink?（）
A.Have a try.
B.Sure.
C.Don‘t go, please.
D.No, thanks.
