x=3是方程11-2x=ax-1的解，则a=（ ）。
2
According to the passage, which of the following is the most severely criticized function of the mass media
A．The function to influence.
B．The watchdog function.
C．The function to advertise.
D．The function to inform.
写出下列特用经济植物所属科的学名。A．油桐和橡胶：（）；B．漆树和盐肤木：（）
