治疗肝火犯胃，呕吐吞酸，常以黄连配伍（）
A.丁香
B.干姜
C.花椒
D.小茴香
E.吴茱萸
参考答案：E
The main purpose of Paragraph 2 is to ______.
A．answer an objection that some readers may raise to Paragraph 1
B．guard against the possibility that you have read Paragraph 1
C．contradict the idea of Paragraph 1
D．show more optimistic than Paragraph 1
天然蛋白质中不包括（）
A.蛋氨酸
B.半胱氨酸
C.脯氨酸
D.精氨酸
E.鸟氨酸
