A。此题考查演绎推理。因为金属导电,铜是金属,所以铜导电,A 选项 conducts 正确,B 选项 doesn't conduct 意思是不导电,不符合推理;C 选项 conduct 形式错误,主语 copper 是第三人称单数,要用 conducts;D 选项 don't conduct 形式错误且意思不符合推理。反馈...
百度试题 结果1 题目Which is a non-metal element? A. Gold B. Silver C. Oxygen D. Copper 相关知识点: 试题来源: 解析 C。Gold(金)、Silver(银)、Copper(铜)都是金属元素,Oxygen(氧)是非金属元素。反馈 收藏
Frank Holmes
1. Resource issues: Copper sulfide ore is the main raw material for pyrometallurgy at present, but the mining grade is getting lower and lower; therefore, low-grade sulfide ore, compound ore, oxide ore and tailings will become the main resources for copper smelting in the future. And this ...
When it comes to scrapping copper, every piece of metal has a unique identity and value. We’ve talked a ton aboutBare Brightand#1 Copper, but let’s dive into the specifics of#2 Copper. Shedding light on what sets it apart from #1 and #3 Copper that you typically find when scrapping...
8The metal used to make a coin is a mixture of steel and copper.The ratio mass of steel:mass of copper is 108:7.The coin has a total mass of 230 milligrams.Calculate the mass of copper in this coin.Answer milligrams [2] 相关知识点: 试题来源: 解析 14M1 for 230/(108+7)x7 ...
When you start investigating how powdered metal parts are made, learning about sintered metal is essential. Many of the things we love most about powder metallurgy can be traced back to the sintering process.
What is the compound name of Cu(NO3)2? What kind of bond would many copper atoms form? What chemical element is Cs? Which symbol represents an isotope of carbon? What is the symbol for a sodium ion? What is the symbol for cerium?
In the extraction of copper from its sulfide ore, the metal is formed by the reduction of Cu2O with AFeS BCO CCu2S DSO2Submit In the extraction of copper from its sulfide ore, the metal is formed by the reduction of Cu2O with AFeS BCO CCu2S DSO2Submit In the extraction of copper fro...
Copper pipesin Australia are referenced to their DN (diamètre nominal) number, which is a nominal metric equivalent to their actual Imperial size. For example, DN20 is the size for copper pipe with an outside diameter of 19.05 mm or 3⁄4 inch. While pipe sizes in Australia are inch-bas...