方程的两边同乘（x-2），得
3+3（x-2）=x-1，
解得x=1．
检验：当x=1时，（x-2）=-1≠0．
∴原方程的解为：x=1．
Another reason _____ he didn’t mention is _____ the poor quality of the buildings worsened the damage.
A．why; because
B．for which; that
C．that; that
D．which; because
MOS集成逻辑电路
