女性,56岁,结节性甲状腺肿伴甲亢,首选何种治疗()
A.硫脲类制剂
B.碘制剂
C.普萘洛尔
D.131I
E.手术
参考答案:E
With the development of economy, China can compete _______ other countries ______ trade. [ ]
A. against ; in
B. with ; for
C. against ; for
D. in ; for
槽距的机械角为10°,因J5型感应子发电机有对极,所以槽距的电角度为()。