— Look, there is a lot of litter in the river.
— Yes, it's said that 80 per cent of fish in this river ________ live long.
A：doesn't
B：don't
C：isn't
D：aren't
石油污染成为日益突出的海洋污染问题，下列海域污染严重的是( )
①沿海水域 ②海上航道沿线 ③海上石油产区 ④石油输出港附近海域
已知函数f(x)=x2,x≤0lg(x+1),x>0,若f(x0)>1,则x0的取值范围为（ ）
