山东省大部分地区属于[ ]
A.暖温带半湿润地区
B.亚热带湿润地区
C.中温带半湿润地区
D.暖温带湿润地区
答案:A
Since then the number of people taking driving lessons ________ 20%.
A.has increased to
B.increases by
C.has increased by
D.have increased by
环境污染物吸收有哪几条途径?各条途径影响吸收的主要因素是什么?