Fuel cells are versatile as they can scale up easily and meet a variety of power needs – large or small. You can ____ individual fuel cells to increase the amount of power they can provide. The taller the stack, the more power you have.
举一反三
- According to the text, the UK scientists have known that ______. A: women have more cells than men when they are born B: women can replace the cells that enable the heart to beat C: the female heart loses few of the cells with age D: women never lose their pumping power with age
- The more the friction of an engine ,the more power It can develop.
- The word "sights" in the first paragraph means （）. A: a small present B: a kind of postcard C: the power of seeing D: something that you can see
- The power of nature can make children more confident in their lives.
- Why may you have cried tears of joy about being finished with high school? A: You have achived the triumph of years of hard work and you will have more freedom. B: You can not get up early C: You can not study late at night D: You will meet more interesting people