What is the potential of hydrogen energy? A. To replace all traditional energy sources. B. To play an important role in the future energy system. C. To cause more environmental pollution. D. To be difficult to store and transport. 相关知识点: ...
【答案】：The advantage of the hydrogen is: (a) Rich resources and can be renewable ; (b) High thermal efficiency; (c) Product is water, no pollination.
with a proton—thus, as a hydrogen atom. The hydrogen atoms are not transferred directly to oxygen, but instead are usually passed first to an electron carrier, a coenzyme called NAD+ (nicotinamide adenine dinucleotide, a derivative of the vitamin niacin). NAD+ is well suited as ...
Choose the correct answer. ( ) 1. What is the chemical symbol for hydrogen? A. H2 B. Hg C. He D. H 相关知识点: 试题来源: 解析 ( ) 1. D ( ) 2. C ( ) 2. Which of the following is a physical change? A. Burning of paper B. Rusting of iron C. Dissolving sugar in wat...
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 the only by-product when we burn hydrogen for energy?A、oxygenB、waterC、electricityD、gasoline 相关知识点: 试题来源: 解析 B (1) 考查细节理解。根据第一段第一句Mario loved to have lots of friends at school.She showed off a lot可知,她常炫耀自己有很多朋友。故选C。 (2) 考查...
In the digestive system, hydrochloric acid (HCl) is used to break down, absorb, and digest nutrients found in the food that an organism consumes. This... Learn more about this topic: Hydrogen Chloride vs. Hydrochloric Acid | Formula, Properties & Examples ...
Why is water an important molecule? What is the importance of pH in human body? What is the importance of iodine in the human body? Why is the water molecule so important to organisms? Why are hydrogen bonds so important in explaining the properties of water?
In photosynthesis, what happens to the hydrogen ions (H+) after water is split in the light - reaction? A. They are released into the air B. They are combined with carbon dioxide in the dark - reaction C. They are used to generate ATP D. They are directly converted into glucose ...
What is the drinking water of hydrogen source 意思是：什么是氢源饮用水？hydrogen n. <化>氢；复数： hydrogens source n. 根源，本源； 源头，水源； 原因； 提供消息的人 vt. （从…）获得； 发起； 向…提供消息； 寻求（尤指供货）的来源 vi. 原料来源； 起源； 寻求来源； 寻求...