下面关于温度计和体温计的用法中正确的是（ ） A．用实验用温度计测温度时，温度计

美国的（）医生于1957年最早提出儿童的“情绪行为障碍”现象。

I tried to persuade my husband to give up smoking but ________. [ ]

A. in advance  

B. in vain

C. in charge  

D. in order

— I expected him to be nervous before his interview, but he was as cool as a cucumber.

— He____ it seriously. [ ]

A. should have prepared

B. might have prepared

C. must have prepared

D. can't have prepared

在病因研究的轮状模型中，强调宿主与下列哪种因素的关系（）。

A.生物因素

B.环境因素

C.物理因素

D.精神因素

E.化学因素

生育保险参保人在进行以下哪种治疗时可以享受生育保险待遇（）

A.变性手术

B.不孕、不育症

C.性功能障碍

D.输精管结扎术