试题来源: 解析 B。把化学元素符号“O”和以“O”开头的物体联系起来是一种有效的记忆方法,因为这样可以通过联想帮助记忆。选项 A 多次重复可能会比较枯燥且效果不一定好。选项 C 只写下来一次可能记不住。选项 D 随机记忆没有系统性,很难记住。反馈 收藏 ...
Which chemical element is important for reducing air pollution? A. Carbon B. Oxygen C. Nitrogen D. Sulfur 相关知识点: 试题来源: 解析 B。解析:氧气能够支持燃烧,帮助减少大气中的污染物,而碳、氮、硫在某些情况下可能会造成污染。反馈 收藏
Chemical elements can be named after planets. Which element is named after Uranus? A. Uranium B. Platinum C. Potassium D. Phosphorus 相关知识点: 试题来源: 解析 A。铀(Uranium)是以天王星(Uranus)命名的。铂(Platinum)、钾(Potassium)、磷(Phosphorus)都不是以行星命名。
Chemical elements can be named after minerals. Which element is named after a mineral containing iron? A. Manganese B. Magnesium C. Mercury D. Molybdenum 相关知识点: 试题来源: 解析 A。锰(Manganese)是以一种含有铁的矿物命名的。镁(Magnesium)、汞(Mercury)、钼(Molybdenum)都不是以含有铁的矿...
百度试题 题目The content of which chemical element is usually constant in a nucleic acid: _ A.CB.OC.ND.HE.P相关知识点: 试题来源: 解析 E 反馈 收藏
Chemical elements may be named after famous scientists. Which element is named after Marie Curie? A. Curium B. Cadmium C. Calcium D. Carbon 相关知识点: 试题来源: 解析 A。锔(Curium)是以玛丽·居里(Marie Curie)和皮埃尔·居里(Pierre Curie)命名的。镉(Cadmium)、钙(Calcium)、碳(Carbon)都不是...
【题文】 Carbon is a chemical element which is present in organic compounds that make us organisms, plants as well as fossil. It is a vital component of the greenhouse gas CO2, the highest percentage of the global warming gas in the atmosphere. These Green House Gases (GIIGs) along with...
Some chemical elements are named after countries. Which element is named after France? A. 中利认议任车亲下没重能全节属中利认议任车亲下没重能全节属Gallium中利认议任车亲下没重能全节属中利认议任车亲下没重能全节属 B. 装斯阶科近书正相斗战委装斯阶科近书正相斗战委Germanium装斯阶科近...
A method for the chemical regeneration of an element which is operated with air or oxygenGODFREY OSWIN,HARRY
aAnalysing chemical databases to identify active hits for specific biological targets still remains widely used. Which element contributes to the efficacy of the processes in terms of response enrichment rates 分析化工数据库辨认激活命中为具体生物目标仍然保持用途广泛。 哪个元素对过程的效力贡献根据反应充实...