产后哺乳期首选（）
A.复方短效避孕药
B.宫内节育器
C.男女绝育术
D.探亲避孕药
E.自然避孕法
参考答案：B
She was reading a book in her chair _____ first time I saw _____ old lady.
A．a; an
B．the; the
C．/; the
D．/; an
国产标准设备
