将x=-3代入分式方程得:-9a5=1,
解得:a=-59.
故选D
Would you like to go fishing with me? Sorry. I have lots of homework ____
A.to do
B.do
C.doing
D.Did
下列哪一项不是神经纤维传导的特征
A.绝缘性
B.生理完整性
C.双向传导性
D.单向传导性
E.相对易疲劳性