与流入肾脏的血液相比，从肾脏流出的血液里哪种成分减少了 [ ]
A．尿素
B．葡萄糖
C．二氧化碳
D．蛋白质
答案：A
This group ______ nearly 18 percent of the state's population, are living in a remote area, which few
people know about. [ ]
A . accounting for
B. accounted for
C . be accounted for
D. being accounted for
男女发育曲线的交叉一般为（）。
A.1次
B.2次
C.3次
D.4次
E.5次
