What is the main advantage of hydrogen energy? A. It is cheap. B. It is abundant. C. It is clean. D. It is E. asy to produce. 相关知识点: 试题来源: 解析 C。中文解析:文章中明确提到氢能源是一种清洁能源,燃烧时只产生水蒸气,没有任何污染物或温室气体。A 选项文中未提及价格便宜;B ...
Hydrogen energy is considered a promising new energy. What is hydrogen usually obtained from? A. Coal B. Oil C. Natural gas D. Water 相关知识点: 试题来源: 解析 D。解析:氢能被认为是一种有前途的新能源。氢通常从水中获得。A、B、C 选项都是传统化石能源,不是氢的来源。本题考查对氢能来源...
What is a by-product of hydrogen fuel cells? A. Pollution. B. Fossil fuels. C. Water. D. Coal. 相关知识点: 试题来源: 解析 C。解析:文章中提到“These fuel cells can produce electricity with only water as a by-product”,氢燃料电池的副产品是水。反馈 收藏 ...
Hydrogen fuel cells can power vehicles. What's the main product of a hydrogen fuel cell? A. Hydrogen B. Oxygen C. Water D. Carbon dioxide 相关知识点: 试题来源: 解析 C。解析:氢燃料电池可以为车辆提供动力。氢燃料电池的主要产物是水。A 选项氢是反应物;B 选项氧是反应物之一;D 选项二氧化碳...
2. What is paragraph 3 mainly about? A. Ways of storing hydrogen safely. B. Benefits of fuel cell electric vehicles. C. Challenges of using hydrogen as car fuel. D. Differences between gasoline and hydrogen.3. What makes it more efficient to get hydrogen from the ocean? A. The applicati...
Hydrogen is a clean alternative to methane and is the most abundant chemical element, estimated to contribute 75% of the mass of the universe. Find out why hydrogen is important as a future clean energy source to fuel our homes and businesses.
Hydrogen, or H₂, is getting a lot of attention lately as governments in the U.S., Canada and Europe push to cut their greenhouse gas emissions.
wordstome.Ihadnoideawhathydrogenwas,andI didn?treally wanttoknow,eitherIfounditallso 45. (bore)and difficult.But Mr Jenkins madeeverythinginteresting.Heusedtoexplainthings whichseemeddifficultwithlotsofpractical46. (example)andinsimplelanguage.Oneday,he tookusoutsideandwe47. (build)arocket! Irememb...
A machine for E. xtracting hydrogen F. rom water 相关知识点: 试题来源: 解析 A。“Hydrogen fuel cell”(氢燃料电池)指的是一种将氢气转化为电能的装置。选项 B 是关于电子设备的电池,与氢燃料电池不同。选项 C 是储存氢气的容器,并非氢燃料电池。选项 D 是从水中提取氢气的机器,也不是氢燃料电池的...
A. Intermolecular hydrogen bonds increase the melting and boiling points of molecules B. Hydrogen bonds between different molecules increase mutual solubility C. Reduce the density of water D. The above three items 相关知识点: 试题来源: 解析 D 反馈...