()是指市域范围内的淡水以及可回用的污水和可利用的海水之和。
A、水资源的广义概念
B、水资源的狭义概念
C、水资源工程的概念
D、城市水资源的概念
参考答案:D
若|m|=4,|n|=2,且m>n,则nm的值为( )
A.16
B.16或-16
C.8或-8
D.8
– How nice the T-shirt looks! Maybe it belongs to Jerry’s.
– It _____ be Jerry’s. It’s much too small for him.
A. must B. can’t C. can