— Can I have some hamburgers?
— _____________[ ]
A. No, thanks.
B. Sure. Here you are.
答案:B
磺胺类药物的活性必需基团是
A.偶氮基团
B.4-位氨基
C.4-杂环基
D.百浪多息
E.对氨基苯磺酰胺
一岁以内婴儿总能量约需每日每公斤体重
A.80 kcal
B.90 kcal
C.100 kcal
D.110 kcal
E.120 kcal