问题
单项选择题
胆固醇结石形成的主要原因是()。
A.慢性胆道感染
B.胆汁中胆固醇浓度增加
C.胆道内蛔虫残体存留
D.胆汁中胆盐和磷脂相对减少
E.胆道梗阻
答案
参考答案:D
胆固醇结石形成的主要原因是()。
A.慢性胆道感染
B.胆汁中胆固醇浓度增加
C.胆道内蛔虫残体存留
D.胆汁中胆盐和磷脂相对减少
E.胆道梗阻
参考答案:D
用单词的适当形式填空。
小题2: There are some _______ in the tree. 小题3: I have some ________ to do on weekends. 小题4: Look! They _________basketball over there. 小题5: ________ for your help. 小题6: Sunday is the _______ day of a week. 小题7:It’s time for us _________ up. 小题8: Let’s __________ in the river. 小题9:Han Mei _________ documentaries because they are boring. 小题10: Lily’s brother plays computer games very ________. |