吸收后得到的溶液叫（）

A. 浓度差
B. 温度差
C. 压力差
D. 电场或磁场的场强差

A. of imperfect competition in the automobile industry.
B. buyers know much more about the quality of used cars than sellers do.
C. sellers know much more about the quality of used cars than buyers do.
D. physical depreciation of used cars is very high.
E. of licensing arrangements by the government.

A. people choose inappropriate or inadequate coverage because they do not understand the complex information in the policies.
B. people choose too much coverage because they do not understand the complex information in the policies.
C. people choose too little coverage because they do not understand the complex information in the policies.
D. unhealthy people become more likely to buy insurance than healthy people, which drives premiums up, which drives even more healthy people away from the market.
E. healthy people become more likely to buy insurance than unhealthy people, which drives premiums up, which drives even more unhealthy people away from the market even though they are the ones who need it most.

A. She will be charged less for her premiums than people who are higher risks.
B. She is less likely to buy health insurance than the average person, because policy premiums are based on expected medical expenditures of people who are less healthy than she is.
C. When she get health insurance, she will be less likely to take care of herself.
D. She must get health insurance early in life, and is likely to lose health insurance if she smokes, drinks to excess, or gains weight.
E. She is more likely than the average person to buy health insurance, because she is more likely to be offered it.