1. Why can't we hear the sound of aeroplane in the nights? 2. Why we are able to hear smaller sound? Explain what happends when sound travel from one medium to another medium? How can a rocket change direction when it is far out in space and is essentially in a vacuum? Explain. ...
解析 travels 本题考查宾语从句的时态。在宾语从句中,当从句描述的是客观真理、自然现象等时,无论主句是什么时态,从句都要用一般现在时。“光比声音传播得快” 这是一个客观事实,所以即使主句 “wanted” 是一般过去时,从句中 “travel” 仍要用一般现在时的第三人称单数形式 “travels”。
Can you believe the magazine sells seven thousands copies a month. A lawyer has been hired to handle the case. Do you know how much the house is worth. Don't hesitate anymore. The best time to invest is now. Employers are encouraged to B sales in the form. A travel accent is a per...
(travel) faster than sound. 相关知识点: 试题来源: 解析 1.travels 考查动词时态。根据句子结构,该宾语从句是叙述永恒不变的 "真理" ,时态应为一般现在时, "light" 是主语,所以谓语动词应为三单形式 "travels" 。句意:过去的人们不知道为什么光比声音传播得快。故正确答案为:travels。
声明: 本网站大部分资源来源于用户创建编辑，上传，机构合作，自有兼职答题团队，如有侵犯了你的权益，请发送邮箱到feedback@deepthink.net.cn 本网站将在三个工作日内移除相关内容,刷刷题对内容所造成的任何后果不承担法律上的任何义务或责任
改间接引语 1.“Why does light travel faster than sound?”Tom asked Mike. 怎么改? 老师说travel要加s ,但我不明白为什么不是加ed ?
There's a reason why women don't read this stuff; it's not funny... 女人不读这种东西是有原因的,它并不好笑。 柯林斯高阶英语词典 Unless you're ill, there's no reason why you can't get those 15 minutes of walking in daily. 除非你病了,否则你没有理由每天连走15分钟都做不到的。 柯...
Why doesn't ultrasound travel through the air?Attenuation Factor:The sound waves are traveling with the most speed in solids followed by liquids and least in air none in a vacuum (as sound waves are longitudinal waves). The audible range of an average human ear is 20 Hz to 20 kHz. The...
generated by earthquakes on one side of the globe, arrive at different times at a point on the other side of the globe, depending on their route through Earth's inner core. When the path has a component parallel to Earth's rotational axis, the sound waves move faster than when their pat...
well as observations in the wild, Mathevon describes, among many other things, how animals communicate with their offspring, how they exchange information despite ambient noise, how sound travels underwater, how birds and mammals learn to vocalize, and even how animals express emotion though sound....