根据短文内容判断下列句子正误。

    There is a zoo near our village．There is a forest in the zoo．There are many animals in the forest．Look! There is a tiger．It's running．Some birds are in the trees．They are singing．Here comes a bear．It's walking．Oh! Look at the monkeys．They are climbing trees．How cute they are! And some rabbits are playing with each other under a big tree．

如图，A、B、C、D、E为某未标出原点的数轴上的五个点，且AB=BC=CD=DE，则点D所表示的数是（　　）

①对节气的正确认识是开展传统农业生产的基础

②气候、物候的变化存在固有的、稳定的联系

③“二十四节气”能有效检验农事安排的合理性

④对气候、物候变化规律的把握要在实践基础上不断深化

People didn't go to school by the bus. ____ 

我国北方地区的耕地以什么为主（　　）。