患者女性，20岁。1周来发热、乏力、纳差、恶心、厌油。1天来眼发黄，但体温已正常。A

已知集合A={y|y²-(a²+a+1)y+a(a²+1)>0},B={y|y²-6y+8≤0}，

若A∩B≠φ，则实数a的取值范围为_________.

—Mr. Wang, I have trouble ______ the text. Could you help me?

—Of course. And remember ______ it three times at least.[ ]

A. to understand; reading

B. understanding; reading

C. understanding; to read

D. to understand; to read

土茯苓用于梅毒、汞中毒所致肢体拘挛，取其什么功效（）

A.解毒除湿

B.通利关节

C.清热泻火

D.舒筋活络

E.祛风湿

拮抗物