特殊重要的工业、能源、国防、科技、教育等方面新建项目的工程选址,要高度重视地区的( )。
A.地下水的性质 B.岩层滑坡C.区域稳定性 D.地震烈度
参考答案:D
-Why does the river smell terrible?
-Because large quantities of water______.
A.have been polluted
B.is being polluted
C.has been polluted
D.have polluted
(a+b-3)(a-b+3)