The flatfish are found in almost all seas, but rarely in fresh _

The flatfish are found in almost all seas, but rarely in fresh _________.
A、rain
B、waters
C、flood
D、areas
【正确答案】:B
【题目解析】:fresh water淡水
句意:几乎在所有的海洋中都有比目鱼,但鲜少在淡水中发现。