题目内容

He found he had not brought money with him when he was about to pay the b___

A. bell
B. bill

查看答案
更多问题

Mrs. Johnson takes pride _____ her daughter, who came first in the race.

A. in
B. by
C. of
D. off

Thanks ___ our medical knowlege, this terrible disease is much less common now.

A. in
B. to
C. from
D. at

You cna pick _____ some useful ideas through talking with your teachers.

A. to
B. at
C. out
D. up

在临床疗效的研究中,下列哪种试验方案最可靠并且最常用:()

A. 随机对照试验
B. 非随机对照研究
C. 交叉对照试验
D. 历史性对照试验
E. 序贯试验

答案查题题库