异位内膜最常见的侵犯部位是（）。
A.子宫直肠陷凹
B.子宫后壁
C.手术切口
D.卵巢
E.宫骶韧带
参考答案：D
线粒体外NADH经苹果酸穿梭进入线粒体后氧化磷酸化，能得到的P/O比值约为（）
A.0
B.1.5
C.2.5
D.3
E.3.5
—John and Lucia got married last week. Did you go to their wedding?
—No, I _________a lecture in another city.
A．gave
B．have given
C．had given
D．was giving
