盛夏的晚上,小明在房间感到很热,他打开电风扇,风吹到身上感到凉快.他抬头看见灯泡有点发黑了,又接着灯光看见寒暑表的温度是40℃.请你就上述情景提出两个物理问题,并解答. 由题意可提出如下的问题:问题1:小明打开风扇为什么感到凉爽?答:因为转动的风扇加快了液体表面上方空气流动,从而加快了汗液的蒸发,蒸发吸热有制冷作用.问题2:温度计是利用什么原理工作的?答:液体的热胀冷缩.
风扇英文怎么读音 风扇的英文:2113fan读音:英[f?n]美[f?n]n.风扇;扇子;扇形物n.迷;狂热爱5261好者vt.扇;展开扇形;4102煽动vi.成扇形;[棒]三振出局词汇1653搭配:1、turn off a fan 关电风扇2、electric fan 电风扇3、ventilating fan 排气风4、ceiling fan 吊扇相关例句:1、We have an extractor fan in the kitchen to get rid of the smell of cooking.我们的厨房里有台排气扇,用来消除油烟。2、Please turn the electric fan on.请打开电风扇。3、She glanced shyly at him from behind her fan.她羞怯地从她的扇子后面看了他一眼。4、It was so hot that we had to have the electric fan on all day long.天太热,我们不得不全天开着电扇。扩展资料:词源解说:直接源自古英语的fann,意为扬谷物的东西;最初源自拉丁语的vannus,意为风。相近词义单词:blower读音:英['bl???(r)]美['blo??r]n.鼓风机;吹风机相关例句:1、He reached over and cranked up the blower.他手伸过去,调快了鼓风机。2、We're planning to use our snow blower just to clear a path to the front door.我们打算用吹雪机在正门清理出条路来。
电风扇英文怎么说? 多乐学英语