Everyone will go through life's stages of ups and downs, _____ self-respect plays a key role in the maturity

of a person. [ ]

A. when

B. which

C. as

D. that

亚硝酸盐中毒的特效解毒剂是（）。

A.亚甲蓝

B.二巯基丙磺酸钠

C.牛奶

D.乳糖

E.葡萄糖