A. good conductors of electricity B. poor conductors of heat C. shiny and hard D. liquids at room temperature 相关知识点: 试题来源: 解析 B。非金属在元素周期表中通常是热的不良导体。选项 A 是金属的特点;选项 C 通常是金属的特点;选项 D,非金属在室温下不一定是液体。反馈...
___ are good conductors. 并非所有的金属都是良导体。相关知识点: 试题来源: 解析 Not all metals [解析] [详解] 考查固定用法。not与all连用,是部分否定,句子第一个单词的首字母大写,所以填Not all metals。反馈 收藏
(a) Explain why(i) metals are good conductors of electricity.(ii) insulators do not conduct electricity.[3] 相关知识点: 试题来源: 解析 (a) mark (i) and (ii) together:mention of free electrons(current is) flow/movement of free electronsinsulators contain no free electrons / metals contain...
百度试题 结果1 题目( ) are good conductors of electricity and heat, having lustrous appearance.A.metalsB.ceramicsC.polymersD.Composites 相关知识点: 试题来源: 解析 答案:A 反馈 收藏
Some materials are good conductors of electricity, ___ some are not. A. 油定维革人消称来近照油定维革人消称来近照but油定维革人消称来近照油定维革人消称来近照 B. 主阶空备志物三细权段动现论量可主阶空备志物三细权段动现论量可and主阶空备志物三细权段动现论量可主阶空备志物三细权...
In a text about the properties of metals, "Metals are good conductors of heat and electricity." Which of the following is not a property related to this characteristic? A. They have a high density B. They have free electrons C. Their atoms are closely packed D. They are brittle 相关...
Answer: Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely.
百度试题 结果1 题目Metals are good conductors of both___ A. Electricity and heat B. Heat and light C. Heat and magnetism D. Electricity and magnetism 相关知识点: 试题来源: 解析 A 反馈 收藏
Why do nonmetals tend to form anions when they react to form compounds? Why can't the halide ions be oxidizing agents? Why do metals only form ionic compounds while metalloids and nonmetals form ionic and covalent compounds? Why are metals good conductors of electricity?
3【题目】metals are good conductors, silver thebest conductor of all.A.Almost, beingB. Almost all, beingC. Almost, isD . Almost all, to be 4 ___ metals are good conductors, silver ___ the best conductor of all. A.Almost, being B.Almost all, being C.Almost, is D.Almost all,...