垄断市场中,保险市场进入障碍的来源有()。
A.寡头垄断
B.自然垄断
C.资源独占
D.政府赋权
参考答案:D
In her shows, Oprah has helped thousands of men and women _____ things that bother them in life.
[ ]
A. come up with
B. go on with
C. keep up with
D. come to terms with
()是指在一定的区域内,在污染物排放总量不超过允许排放量的前提下,内部各污染源之间通过货币交换的方式相互调剂排污量,从而达到减少排放量、保护环境的目的。