What is a by-product of burned coal? A. Aluminum, silicon, and magnetic. B. Paving material. C. Fly ash. D. Concrete additive. 相关知识点: 试题来源: 解析 C答案为 C。根据题干找到第一段第三句, two kinds of ash by-product are produced: a heavy bottom ash and a fine-as-powder ...
百度试题 结果1 题目What is a by-product of burned coal? A. Aluminum, silicon, and magnets B. Paving material C. Fly ash D. A concrete additive 相关知识点: 试题来源: 解析 C 反馈 收藏
In an age when waste today means a lack tomorrow, use of every available resource becomes more and more important. As coal is being used in greater and greater amounts to produce electricity, larger amounts of ash, by-product of coal, are produced. When coal is burned in a boiler, two...
In an age when waste today means a lack tomorrow, making use of every available resource becomes more and more important. As coal is being used in greater and greater amounts to produce electricity, larger amounts of ash, by-product of coal, are produced. When coal is burned in a boiler...
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As Marianne Williamson wrote, “ ___ is what happens when we allow ourselves to recognize how good things really are. 1. A.recognized B.realized C.memorized D.thought 2. A.website B.check C.information D.search 3. A.connected B.hidden C.changed D.forgotten 4. A.found B.called C.v...
However, since 2010 nearly a third of these coal-fired plants have been shut down or converted to less expensive and cleaner burning natural gas (which produces only about one-fifth as much CO2 as coal when it is burned). The rapid growth of wind and solar power has also reduced the ...
When burned, fossil gas emits about half as much carbon dioxide as coal. But gas is primarily composed of methane — a potent greenhouse gas whose near-term warming power is many times that of CO2. That methane is prone to leak along the complex supply chain, from t...
Greenhouse gas concentrations and global temperatures will not increase indefinitely — today's carbon dioxide buildup and warming trend must eventually top out and then reverse as the atmosphere gradually recovers. The first stage of this process will occur when the rate at which we burn coal, oi...
Some scientists believe that hydrogen energy may be a cleaner, more efficient way to power our world. Hydrogen is a naturally occurring gas and the most abundant substance in the universe. (The word in Greek means “water former” because hydrogen creates water when burned.) When used alongside...