题目内容

在PowerPoint2016中,对幻灯片中的标题设置动画效果可以使用“切换”进行操作。( )

A. 对
B. 错

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In the U.S., the world’s largest body of freshwater, the Ogallala Aquifer, an underground lake that extends from the Colorado Rockies to South Dakota going all the way down to the Texas Panhandle with a range of ____ feet of depth. This water resource is what has made America’s plains the “_” of the world. Unfortunately, like an oil well, this won’t last ____. The Ogallala used to have an average depth of 240 feet. Today its average depth is just 80 feet.

The speaker is talking about the coming global ________ problem.

Water is the key component in our daily life, not only for human use, but for energy, industry, ______________and livestock.

If you look at the earth, you will notice that over 75 % of our blue planet is water. But the problem is only 3% of that water is ________water.