百度试题 结果1 题目What is the chemical symbol for water? A. H2O B. CO2 C. O2 D. NaCl 相关知识点: 试题来源: 解析 A 反馈 收藏
aDONALD: Yesterday you said it's H to O. DONALD : 昨天您说它是H到O。 [translate] aTEACHER: Donald, what is the chemical formula for water? 老师: Donald,什么是化学式为水? [translate] 英语翻译 日语翻译 韩语翻译 德语翻译 法语翻译 俄语翻译 阿拉伯语翻译 西班牙语翻译 葡萄牙语翻译 意大利语...
All matter is characterized based on its properties. In this lesson, you will learn about the different chemical properties of matter and ways to...
A. The water will boil. B. The water will freeze. C. The chemical will disappear. D. The properties of the water may change. 相关知识点: 试题来源: 解析 D。加入化学物质可能会改变水的性质。选项 A,不会因为加化学物质就沸腾;选项 B,不会因为加化学物质就结冰;选项 C,化学物质不会消失。反馈...
Water is a chemical compound composed of two hydrogen atoms and one oxygen atom. It's used as a solvent and a reactant in many processes, such as those that produce starch, ethanol, soap, and paper.
What may chemical substances accumulate in? A. Water B. Air C. Soil D. Space 相关知识点: 试题来源: 解析 C。中文解析:“Some chemical substances may also accumulate in the soil and have a long-term impact on the ecological environment.”表明一些化学物质会在土壤中积累。
A. Increase in aquatic organisms B. Improvement of water quality C. Death of aquatic organisms and disruption of aquatic ecosystems D. No E. ffect on the environment 相关知识点: 试题来源: 解析 C。解析:文章中提到化学物质会污染水体,导致水生生物死亡并破坏水生生态系统。A 选项水生生物增加与文...
2.There are several chemical factories___ waste water into the stream.3.What's ___,the factory makes too much noise ...4.Noise is ___ to humans' health.5.People who work and live in noisy conditions often ___ deaf.6...many teenagers...
A. Make the water cleaner. B. Increase the amount of water. C. Contaminate water sources and make the water unfit for drinking and aquatic life. D. Have no E. ffect on water sources. 相关知识点: 试题来源: 解析 C。解析:文中提到 It can contaminate water sources, making the water unf...
A. Use water to wash it away immediately. B. Try to clean it up with your bare hands. C. Wear proper protective equipment and follow the safety procedures. D. Ignore it and hope it goes away on its own. 相关知识点: 试题来源: 解析...