A. It's time for Chinese class. B. It's time for lunch.
C. It's time for school. D. Time to go home.
____
At last they succeeded in out the maths problem.
如图,数轴上表示数2的相反数的点是( )
下图为莫湖泊测量数据,作图为该湖泊面积与湖面高程变化示意图,右图为该湖泊流域气温及降水量相对于多年平均值的变化曲线图。完成下列各题。