下列因素中,对理论塔板高度有影响的是
A. 填料粒径和填充均匀度
B. 温度
C. 压力
D. 载气的大小
E. 流动相的线速度
A policy is cost-effective if it produces for society a maximum of net benefits.
A. 对
B. 错
Efficiency occurs when marginal abatement costs equal marginal damages.
A. 对
B. 错
A policy is efficient if it produces for society a maximum of net benefits.
A. 对
B. 错