在市场机制下,个人和企业无法保障公共物品的供给,而林业向社会提供足够的公共物品最不需要()。
A.产权安排
B.价格机制
C.政府参与
D.承包经营
参考答案:D
—How much did you spend on such a nice jacket?
—About 5 dollars.
—What a _____! I thought it would cost 20.
A. price
B. buy
C. bargain
D. cheat
简述直流电药物离子导入的优点?