题目

查阅某地区的等高线地形图,发现一局部如下图所示,等高距为50米,则a等高线代表的数值是( ) A . 200 B . 150 C . 300 D . 250 答案:DAll the students ____ to wear uniforms to school tomorrow.A. will supposeB. are supposed toC. suppose
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