下列反应属于氧化还原反应的有()。
A.碘酸钾滴定卡托普利
B.碘滴定安乃近
C.EDTA滴定钙
D.硫酸铈滴定琥珀酸亚铁
E.亚硝酸钠滴定对氨基水杨酸钠
参考答案:A, B, D
We ________ on this project for four hours. Let's have a rest.[ ]
A. are working
B. have been working
C. worked
D. had worked
消渴病,口渴引饮,能食与便溏并见,精神不振,四肢乏力,舌质淡,苔白而干,脉弱。宜选下述何方加减治疗()
A.消渴方
B.玉女煎
C.七味白术散
D.六味地黄丸
E.金匮肾气丸