I=Px•X+Py•Y是消费者的（）
A．需求函数
B．效用函数
C．预算约束方程
D．不确定
参考答案：C
— What's the matter? Your eyes look red.
— My eyes haven't ______ the new glass yet. [ ]
A. applied to
B. adjusted to
C. accessed to
D. approached to
败毒散的君药是
A．柴胡、前胡B．人参C．川芎、枳壳D．羌活、独活
