函数y=sinx+cosxsinx-cosx是( )
在一部历史小说中,主人公生于1843年,59岁去世。他的经历中不可能有( )
不等式x2-ax-b<0的解集为{x|2<x<3},则不等式bx2-ax-1>0的解集为( )
— When's your birthday?
— It's ___________ January 1st.
— What would you like ________ a birthday present?
— I would like a yo-yo. ( )