单项选择题

水平断面法是沿水平方向，通过等高线取断面。断面面积即等高线所围合的面积，相邻断面的高即为两相邻等高线间的距离。
A、正确
B、错误

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There are just five steps to become a suppliers and then you can sell products for foreign trade on DHgate.com: first sign up, second authentication, third discount, next order and shipping, last delivery.
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