【简答题】Others feel there is more of a case for the theory. Harnessing利用 the wind would not have been a problem for accomplished sailors like the Egyptians. And they are known to have used wooden pulleys, whi...
【单选题】How Wind Energy Works Harnessing the wind is one of the cleanest, most sustainable ways to generate electricity. Wind power produces no toxic emissions and none of the heat trapping emissions that con...