方程(x+22)/5-(5-2x)/3=2的解为( )A．x=-1/2 B．x=1/_爱下问搜题

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问题单项选择题

方程(x+22)/5-(5-2x)/3=2的解为( )

A．x=-1/2

B．x=1/2

C．x=2

D．x=-2

答案

参考答案：A

选择题

With April 18's railway speedup, highway and air transport will have to compete with ____ service for passengers.

A. good
B. better
C. best
D. the best

填空题

分解因式：4a²b-4b= ．