抛物线y=2(x-3)2-1的对称轴是直线( )
A.x=-1
B.x=2
C.x=3
D.x=-3
∵y=2(x-3)2-1
∴其对称轴为x=3,
故选C.
We firmly believe that ______ the new examination system comes into existence, completely new situations will arise.
A.considering
B.supposed
C.providing
D.given
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