解析 B。解析:蜡烛燃烧时,蜡与氧气发生化学反应,生成二氧化碳和水,这是蜡烛燃烧这个化学变化的本质。选项A蜡不会单纯地变成水。选项C蜡不会变成氢气。选项D蜡更不会变成氧气。从英语角度看,考查了蜡、氧气、二氧化碳、水、氢气等英文单词以及对蜡烛燃烧化学原理用英语描述的理解。
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Also, skin cancer may look different in people with darker skin tones than they do in in people with fair skin. If you have any new spots, changing spots or feel like an area of your skin looks or feels differently, see a dermatologist so they can check you for skin cancer. What ...
Contact lenses that do not fit well, are damaged, or are worn too long A scratch or poke from a fingernail or objects such as a pencil or tree branch Objects such as dirt, sand, or metal shavings that get into your eye Rubbing your eyes too hard Chemical or flash burns caused by ...
mediamanagerforAdidas.“Like,areyou mad? What?sgoingon? Like,didIdosomething wrong?” Klinsaidthisdemonstrateslanguageisconstantlychanging. “Languageevolution has 高中英语 选择性必修 第二册 1-50页 51-80页 展开 百万用户使用云展网进行3d电子书制作,只要您有文档,即可一键上传,自动生成链接和二维码(独立...
Chemical burnsBurn managementDecontaminationBurn surgeryIrrigationImmediate debridementThe purpose of this study is to investigate the efficacy of decontamination by immediate surgical debridement in the acute management of chemical burns as compared to conventional dilutional approaches by irrigation or wetting....
Does meat like beef, chicken, and turkey have lectins? Yep… Credit: Division of Molecular Biosciences, Imperial College London (5) Not only do meats (vertebrate animals) have the same broad types/categories as plants, but they also haveothersin addition, as seen above. ...
A balanced aquarium is a happy aquarium. But when pH levels climb too high, it spells trouble. Your tropical fish could face increased illness risks, and their protective layers might get damaged, leaving them vulnerable to chemical burns on their gills, eyes, and scales. And plants? High pH...
The GHS, or Globally Harmonized System in short, is one way every individual who meets a hazardous chemical can understand its specific dangers. What is the GHS? Let's take a closer look. What is the GHS? The GHS is the Globally Harmonized System of Classification and Labelling of ...
All considered, Evans doesn’t ever burn candles and discourages doing so, she said. Farooq, the pulmonologist, on the other hand, does use candles. She’s just careful about what she buys and where she burns them, she said. Evans’ advice even goes for candles scented with essential oil...