要使分式有意义,
则x-1≠0,
解得x≠1.
故选A.
He speaks too quickly_________.
A.understand
B.write them down
C.to understand
D.and write
一般轿车的悬架弹簧有哪些?()
A.螺旋弹簧
B.扭杆弹簧
C.空气弹簧