Hazardous waste sites are disproportionately located in areas where there are large populations of poor people.
查看答案
Hazardous waste sites are disproportionately located in areas where there are large populations of rich people.
A. 对
B. 错
Technological change shifts the marginal abatement cost function upward.
A. 对
B. 错
Consistent policies encourage new technology.
A. 对
B. 错
Unstable policies encourage new technology.
A. 对
B. 错
微信支付 
支付宝支付