题目

Our earth is called a water planet for nearly 70% of its surface (cover) with water. 答案：【1】covered有人说地球实际上是个“水球”，以下依据正确的是（　　）A．粗略地说，地球上七分海洋，三分陆地B．人类有史以来都居住在陆地上C．粗略地说，地球上三分海洋，七分陆地D．地球上海陆面积比是5.1：4..9