痛经气血虚弱证的治法是（）
A．理气化瘀止痛
B．温经暖宫止痛
C．益气养血止痛
D．清热除湿，化瘀止痛
E．益肾养肝止痛
参考答案：C
某车间有60名工人，生产甲、乙两种零件，每人每天平均能生产甲种零件10个或乙种零件25个，应分配多少人生产甲种零件，多少人生产乙种零件才能使每天生产的甲种零件和乙种零件刚好配套？（2个甲种零件和1个乙种零件配成一套）
If the price of product X increases from $2.00 per unit to $ 2.25 per unit, the demand will decrease from 7.5 million units to 6.7 million units. What is the price elasticity of demand for the product, and is the demand for the product elastic or inelastic（）
A. -1.04; elastic.
B. -0.96; elastic.
C. -0.96; inelastic.
