孕妇羊水生化测定,反映胎儿肺成熟度的指标是() A.肌酐测定 B.胆红素测定 C.乳 发布时间:2017-05-16 16:34 │ 来源:www.tikuol.com 题型:单项选择题 问题: 孕妇羊水生化测定,反映胎儿肺成熟度的指标是()A.肌酐测定B.胆红素测定C.乳酸脱氨酶测定D.卵磷脂与鞘磷脂的比值E.尿素氮测定
题型:单项选择题 John, you play with the knife, or you hurt yourself.A.won’t; can’tB.mustn’t; mayC.shouldn’t; must D.can’t; shouldn’t 查看答案
题型:单项选择题 — Daddy , can you buy me a new MP3 when you go to Beijing? — You get one if you are admitted to a key middle school. [ ]A. could B. shall C. may D. can 查看答案