百度试题 结果1 题目Which chemical element symbol is used in making fertilizer? A. N B. Cl C. Br D. I 相关知识点: 试题来源: 解析 N。氮(N)元素用于制造肥料。氯(Cl)用于消毒等,溴(Br)用于阻燃剂等,碘(I)用于医药等。反馈 收藏
In the process of making glass, which chemical element is essential? A. Silicon B. Magnesium C. Calcium D. Aluminum 相关知识点: 试题来源: 解析 A。解析:硅是制造玻璃的主要成分之一,是必不可少的元素。镁、钙和铝在制造玻璃中不是最关键的元素。
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。
百度试题 结果1 题目Which chemical element is used in fertilizer? A. Potassium B. Sulfur C. Phosphorus D. Boron 相关知识点: 试题来源: 解析 C。磷在肥料中被广泛使用。钾也用于肥料但本题重点考查磷。硫和硼在其他方面有应用。反馈 收藏
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...
结果1 题目 Which chemical element is not likely to be found in a common chemical experiment for fourth graders? A. Mercury B. Carbon C. Oxygen D. Hydrogen 相关知识点: 试题来源: 解析 A。四年级学生的普通化学实验中不太可能出现汞,而碳、氧气和氢气相对常见。 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 ...
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
百度试题 结果1 题目a chemical element which is present in teeth, bones and chalk 相关知识点: 试题来源: 解析 calcium 解析见答案 反馈 收藏