下列关于胆盐肝肠循环的叙述，正确的是
A．胆盐在十二指肠被吸收
B．每次重吸收约80%
C．可刺激胆汁分泌
D．可促进胆囊收缩
参考答案：C
According to the passage, what is a megapolis
A．One of the 10 largest cities in the United States.
B．One of the 18 largest cities in the United States.
C．One of thel00 cities between Boston and Washington.
D．Any number of continuous adjacent cities and suburbs.
“干工作要为油田负责一辈子，要经得起子孙万代的检查”这是（）说的。
A.屈清华
B.王进喜
C.马德仁
D.周占鳌
