(所给词的适当形式填空) 相关知识点: 试题来源: 解析 【答案】conductor 【解析】【分析】【详解】考查名词。句意:众所周知,金属是良导体。分析句子成分可知,“a good ___ (conduct)”作表语,根据其前的冠词a可知,应用单数形式,意为“导体”,故填conductor。反馈 收藏 ...
The thermal and electrical conductivity of all metals is high compared to nonmetallic substances, such as plastics and ceramics, rocks, and solid salts.The aluminum foil, steel wool, paper clip, copper, charcoal stick, and graphite pencil were good conductors and displayed metallic properties. The...
题目Which substance is a good conductor of electricity? A. Glass B. Wood C. Metal D. Plastic 相关知识点: 试题来源: 解析 C。本题考查物质的导电性。Glass(玻璃)、Wood(木头)、Plastic(塑料)都是绝缘体,不导电;Metal(金属)是良好的导体。
Among these elements, which one is a non - metal element known for its excellent electrical conductivity? A. Silver B. Copper C. Graphite D. Iron 相关知识点: 试题来源: 解析 C。解析:Graphite(石墨)是碳的一种同素异形体,属于非金属元素,它以良好的导电性而闻名。Silver(银)、Copper(铜)和Iron...
百度试题 结果1 题目Which of the following materials is a good insulator? A. Metal B. Wood C. Copper D. Silver 相关知识点: 试题来源: 解析 B。木材(Wood)是良好的绝缘体,金属(Metal)如铜(Copper)和银(Silver)是导体。反馈 收藏
Metal is a common material in engineering. Which of the following is not a metal? A. iron B. aluminum C. glass D. copper 相关知识点: 试题来源: 解析 C。本题考查材料科学中金属的概念。铁(iron)、铝(aluminum)和铜(copper)都是常见的金属。而玻璃(glass)是一种非金属材料,主要由硅酸盐等组成...
解析 B。解析:文章中提到 Silver is even more conductive than copper. Gold is mainly used for decorative purposes due to its high cost and not as conductive as silver. Aluminum is not as conductive as copper or silver. So the most conductive metal is silver....
A conductor, or electrical conductor, is a substance or material that allows electricity to flow through it. In a conductor, electricalchargecarriers, usuallyelectronsor ions, move easily fromatomto atom when voltage is applied. Most metals like copper are considered good conductors, while nonmetals...
aSolder is a metal alloy that is used for making electrical connections.There are several types of solder with various applications.The most common type of solder consists of tin and lead with a rosin core.Some types of solder have an acid core.In electronic devices rosin-core solder should ...
The process in order to be covered with a metal mass is a good conductor of heat, a surface made of iron or an alloy of ironSTRASSER ALBERT