e) Ionic substances are hard but dissolve in waterf) ionic substance conduct electricity when dissolved in water第一个做完了下面几个求助 相关知识点: 试题来源: 解析 金属内部的电子一直在做无规则的运动,在产生温度梯度或施加电场后,电子运动的取向近似一致.从而传导热和电流.反馈 收藏 ...
答案:conduct考查谓语动词.根据前面的主语Most metals和后面的宾语electricity可知,此处是谓语动词,根据句意"大多数金属导电性很好."可知,此处是叙述的客观情况,所以应用一般现在时,因为主语Most metals是第三人称复数,所以动词应用原形,conductor是名词意为"导体",故选conduct.结果一 题目 Most metals ___electricity...
How Metals Conduct Applying electricity to a metal conductor provides the electron cloud additional electrons. The excess is free to travel as an electric current. While metals conduct, how is partly dictated by current frequency. For high frequency AC electrical flow, there is askin effectto take...
All metals are found not to conduct electricity equally well. A. 人们发现并不是所有金属的导电性能都一样
【解析】V.句式升级1.①can conduct electricity这是一个简单句,属于主谓宾结构。②that have the capability这是一个主从复合句,that引导定语从句,其中动词不定式作后置定语。2.①Franklin's lightning experiment这是一个简单句,属于主谓宾结构。② who experimented with lightning这是一个主从复合句,who引导定语从句...
Why do metals conduct heat so well?The electrons in metal are delocalised electrons and are free moving electrons so when they gain energy (heat) they vibrate more quickly and can move around, this means that they can pass on the energy more quickly.Which metals conduct the best?
a) Metals conduct electricityb) Metals conduct heatc) Metals are ductile d) Ionic substances shatter when hit e) Ionic substances are hard but dissolve in waterf) ionic substance conduct electricity when dissolved in water第一个做完了下面几个求助 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多...
Metals conduct electricity becausethey have “free electrons.” Unlike most other forms of matter, metallic bonding is unique because the electrons are not bound to a particular atom. This allows the delocalized electrons to flow in response to a potential difference. ...
Most metals conduct electricity to a certain extent. Some metals are more highly conductive than others. Copper, silver, aluminum, gold, steel, and brass are common conductors of electricity. The most highly conductive metals are silver, copper, and gold. ...
百度试题 结果1 题目不是所有的金属都具有同样好的导电性能。( )All metals do not conduct electricity equally well.正确错误 相关知识点: 试题来源: 解析 正确 反馈 收藏