Read and number.

     We sat on a big rock and wan- ted to drink some water. Then there was a big noise in the trees.

Suddenly this big thing came out from the trees and walked to, the river.  It was very big but had a

small head. It walked like a duck. We were afraid and sick. We ran to our house. Our mother and

father put us to bed. They said, "You will be better in the morning". But we will always remember this.

                                                                                                                                                Matt

建设项目的水生生态环境调查，一般应包括( )。

A．水质

B．水温

C．水文

D．水生生物群落