[填空题](see)（）from space, our earth, with water covering 70% of its surface, appears as a "blue planet".

[单项选择]Seen from space, our earth, with water covering 70% of its surface, appears as a “blue planet”（）
A. 如果从太空中看地球的话，地球像一个蓝色的行星，而且地球的表面70%都是水。
B. 地球表面的70%都被水覆盖着，从太空中看地球，它就像一颗蓝色的行星。
C. 从太空上看我们的地球，它表面的70%都被水覆盖着，看上去像一颗蓝色的行星。
D. 从太空中看到地球的表面的70%都是水，它是一个蓝色的行星。

[单项选择]____ from space, our earth, with water covering 70% of its surface, appears as a "blue planet".
A. Seeing
B. To be seen
C. Seen
D. Having seen

[简答题]Seen from space, our earth, with water coveting 70% of its surface，appears as a "blue planet". A) 如果从太空中看地球的话，地球像一个蓝色的行星，而且地球的表面70％都是水。 B) 地球表面的70％都被水覆盖着，从太空中看地球，它就像一颗蓝色的行星。 C) 从太空上看我们的地球，它的表面的70％都被水覆盖着，看上去像一颗蓝色的行星。 D) 从太空中看到地球的表面的70％都是水，它是一个蓝色的行星。

[单项选择]______ from the moon, our earth ,with water ______ seventy percent of its surface, appear as a "blue ball".
A. See ,covered
B. Seeing ,covering
C. Seen ,covering
D. To see, to cover

[填空题](see){{U}} {{/U}}from space, our earth, with water covering 70% of its surface, appears as a "blue planet".

[单项选择]

Water
From the beginning, water has furnished man with a source of food and a highway to travel upon. The first (51) arose where water was a dominant element in the environment, a challenge to man’s ingenuity. The Egyptians invented the 365-day calendar (52) the Nile’s annual flooding. The Babylonians, who were among the most famous law-makers in ancient times, invented laws (53) water usage. Water inspired the Chinese to build a 1,000- (54) canal, a complex system which, after nearly 2,500 years, remains still practically (55) and still commands the astonishment of engineers. But the (56) never found complete solutions to their water problems. The Yellow River is also known (57) "China’s Sorrow"; it is so unpredictable and dangerous (58) in a single flood it may cause a million (59) . Floods slowed the great civilization of the Indus River Valley, and inadequate drainage rui
A. in use
B. for use
C. by use
D. on use