_______ from space, we can find 70% of the surface of the earth _______ by water

题干

_______ from space, we can find 70% of the surface of the earth _______ by water.

A．Seeing …... covering	B．Seeing …... covered
C．Seen ...... covering	D．Seen …... covered

上一题下一题 0.85难度单项选择更新时间:2010-11-11 11:50:31

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