方程两边同乘以x(x-2),得4x=5(x-2),
解得x=10,
将x=10代入x(x-2)=80≠0,
所以原方程的解为:x=10.
手指关节梭形成见于()。
A.风湿性关节炎
B.指关节外伤
C.类风湿关节炎
D.尺神经损伤
E.正中神经损伤
The old man _____ in Shanghai, but he _____ in Jiangyan now.[ ]
A. be born; live
B. was born; live
C. is born; lives
D. was born; lives