已知x=-1是方程x2+mx+1=0的一个实数根，则m的值是[ ]
A.0
B.1
C.2
D.-2
答案：C
I can never forget the days________we worked together and the days________we spent together.[ ]
A．on which；when
B．which；when
C．what；that
D．when；which
石淋，治疗应首选方剂
A．石苇散B．八正散C．知柏地黄丸D．无比山药丸E．滋水清肝饮
