根据第一段前两句“Sound is a form of energy that can't beseen. We can sense sound.”可知声音是一种看不见的能量形式,但能感觉到,C项错误。根据第四段第三、四“If youput a few grains of rice on the drum gently. The vibrations maycause the rice to jump.”可知轻轻地在鼓上放几粒米。
7.Sound is a form of energy transfer and we could define loudness in terms of the energy per unit of time or power output of the sound,but it wouldn’t give the complete picture.Sound waves travel outward like balloons expanding around their source.The sound’s power is distributed on ...
Sound is a kind of energy that you can hear. Sound is made when something vibrates(振动). When you talk or sing,put your hand on the side of your neck. Then you will feel your neck vibrating. When you hit a drum, the drum and the air around it vibrate. When the vibrating air ...
故选B。2.细节理解题。根据“Sound is made when something vibrates”可知声音是通过振动产生。故选A。3.主旨大意题。根据“Light, heat and sound are forms of energy. Here is an introduction to them.”以及本文内容可知本文主要介绍了和光、热和声音有关的信息。故选D。
It requires periodic recharging or replacement of these batteries for extending the working of such devices. Each time in order to charge these batteries an alternating current is necessary. Here we present sound as a new form of renewable energy for charging of these batteries to some extent. ...
根据Sound is made when something vibrates(声音是在物体振动时发出的)可知声音是在物体振动时发出的。故选A。(3)主旨大意题。根据Light,heat and sound are forms of energy.Here is an introduction to them.(光、热和声音是能量的形式。下面是对它们的介绍。)可知是介绍了光、热和声音...
因此D项正确。思有所悟I know light energy. Light energy is the only form of energy that we canactually see directly. It is a type of kinetic energy, and it can also beconverted into other forms of energy. 反馈 收藏
The fans can produce___ energy.A.soundB.heatC.movingD.light 相关知识点: 试题来源: 解析 sound 声音;heat 热;moving 移动;light 光。根据语境"风扇能产生___能。"和物理知识。可知风扇在转的时候能产生动能,因此"moving"符合题意。故选:C。反馈 收藏...
A. Sound energy B. Light energy C. Heat energy D. Electrical E. nergy 相关知识点: 试题来源: 解析 A。当铃响的时候,产生的是声音,声音是一种能量形式,即声能。B 选项光能是由光产生的能量;C 选项热能是由温度差产生的能量;D 选项电能是由电荷流动产生的能量。反馈...
1短语填空 full of energy, in the shade, once a month, on exhibition, on the stage, sound like 19. Theold lady was so___asif she never felt tired.20. ThoughI was a bit nervous ___,I performed my role quite well.21. Nomatter how busy she is, she goes home to see her parents...