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.
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...
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) 考查词义推测。invisible adj.看不见的in是否定前缀,因此一定是一个含否定意义的词。故选A。 (3) 考查细节理解。根据倒数第二段倒数第二句Mario saw George, Lucas,...
结果1 题目26 What is the role of hydrogen peroxide as shown in the reaction?Ag2O + H2O2→2Ag + H2O + O2 D A a catalyst B a dehydrating agent C an oxidising agent D a reducing agent 相关知识点: 试题来源: 解析 D 反馈 收藏
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 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...
What is one of the most important compounds of oxygen? A. Hydrogen (H₂) B. Water (H₂O) C. Carbon monoxide (CO) D. Nitrogen (N₂) 相关知识点: 试题来源: 解析 B。原因:文章中明确提到“One of the most important compounds of oxygen is water (H₂O).”。 反馈 收藏 ...
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Step by step video & image solution for What is the chemical symbol of hydrogen? by Chemistry experts to help you in doubts & scoring excellent marks in Class 8 exams.Updated on:21/07/2023 Class 8CHEMISTRYKNOW ABOUT SOME COMMON GASES (OXYGEN AND HYDROGEN) ...