2 (a) State what is meant by kinetic energy.相关知识点: 试题来源: 解析 动能是物体由于其运动而具有的能量。物体运动得越快,其动能就越大。例如,一辆快速行驶的汽车比一辆缓慢行驶的汽车具有更大的动能。 问题要求解释动能的含义。参考答案“动能是物体由于其运动而具有的能量”简洁明了地回答了这个问题,是...
Physical properties are those properties which are natural in the material and cannot be permanently altered without changing the material itself, include: weight , [小题1] , thermal and electrical conductivity , rate of thermal expansion, and melting point.A...
这里meant 是mean 的被动语态。例(1)：主动语态： “Forthrightness” means what?被动语态： What is meant by “forthrightness”?例(2)：主动语态： Rita writes a letter.被动语态： A letter is written by Rita.例(3)：主动语态： 一辆车撞死了行人 被动语态： 行人被一辆车撞死...
6(a) Explain what is meant by(i) a progressive wave,[2](ii) the diffraction of a wave.[2](b) Two microwave sources S1 and S2 are situated as shown in Fig. 6.1. The waves emitted by the two sources are in phase and are polarised in the same plane.1》P -5.0cm o-1S2一一3.2...
(b)State what is meant by the terms(i) element,(substance that) cannot be split up/ broken down into (two or more) simpler substances by chemical means1...OR(substance) made of atoms with the same atomic number/ number of protons/ proton number.on number... [1](ii) compound,(two...
8 (a) (i) Explain what is meant by photoelectric effect...2](ii) Experimental observations on photoelectric effect could not be explained by the wave model of light. Use the particle model of light to provide an explanation for each of the following observation:1. Regardless of the intensi...
翻译： 几千年的中国文化充实着中国梦，同时，过去三十几年的改革开放也激励着中国梦。中国梦最显著的特征是包容性和双赢合作。这些也是使中国梦扩大它的全球影响范围和被其他国家的人民认可的基本特征。中国梦是民族复兴的梦。它是建设一个强大繁荣的国家，给中国人民带来幸福生活的梦。中国梦需要维持稳定...
字数:150字左右!大学水平内容:1.what is meant by "thinking positively?" 2.what is the connection between success and optimism?3.How can we keep an optimistic and positive attitude?必须包含这三条信息且内容连贯,内容可以自编, 2 写作文,要求:有些文采,不要有太多的语法错误(会用一些从句之类的句子...
ZhouChengyuwasinchargeoftherocketconnectorsystem—describedasavitalrole.Her storyinparticularhasdrawnthepublic?sattentiongivenheryoungage.Socialmediausershave beencelebratingherbrillianceandreferringtoherasprideofthecountry. Beingtheyoungestoftheteam,ZhouChengyuwasbornin1996intheprovinceofGuizhou. Sheiscertainlynot“...
结果1 题目(c) What is meant by the term unsaturated hydrocarbon?unsaturated hydrocarbon 相关知识点: 试题来源: 解析 (contains) double bond/ triple bond/ multiple bond(s)/not all bonds are single(contains) carbon and hydrogen only 反馈 收藏 ...