未采用盲法收集资料的临床药物疗效实验研究,最容易产生的偏倚是()。
A、选择偏倚
B、无差异错分偏倚
C、有差异错分偏倚
D、混杂偏倚
E、以上都是
参考答案:C
保钾利尿剂有()
A.呋赛米
B.螺内酯
C.氨苯喋啶
D.双氢克尿噻
E.依他尼酸
根据汉语提示完成下列英语句子,每空一词。
1. _____ _____ (多么远) is your home from your school?
2. — What do you _____ _____ (认为) the English teacher?
— She is friendly.
3. The old women has to _____ _____ (依靠) her daughter.
4. One healthy habit can help you _____ good _____ (取得好成绩).
5. I can't join you because I _____ _____ (必须) help my mom this weekend.