下列哪项不是麝香的功效
A.清热散结B.开窍醒神C.活血通经D.止痛E.催产
参考答案:A
已知点A(2、5),B(4、5)是抛物线y=ax2-bx+c上两点,则抛物线的对称轴方程是______.
No reader ________ take away a book from the library without the permission of the librarian.
A.need
B.might
C.shall
D.will