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”。
People in the past didn't know why light (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...
Why doesn't light carry momentum? What would be the effect of temperature on the speed of sound and Why? Why is the momentum in a spaceship traveling in space not conserved? Explain. Why can't we travel faster than the speed of light?
Can sound waves travel through vaccum ? View Solution View Solution View Solution View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions KC Sinha Solutions for Maths Cengage Solutions for Maths DC Pandey Solutions for Physics ...
Statement 1 : Light can travel through vacuum Statement II : Light needs a medium to travel. View Solution Light waves can be polarised but sound waves cannot be. Why? View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions ...
2.you look bad.you had better___(be)in hospital3.we all know that light___(travel)much faster than sound4.can you finish___(draw)a horse in 10 minutes.5.hurry up,the meeting___(begin)soon6.miss yang may gou to the library___(borrow)books7.listen carefully.someone___(cry)over...
Whether people have had a stronger wish to protect their personal space in recent times is hard to say. Yet studies of airlines show that people have a strong desire(渴望) to have space to themselves. In a survey by TripAdvisor a travel website people said that if they had to pay more...
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...
Examines why compressional sound waves travel faster along the earth's axis in the inner core. Analysis of the origin of the seismic anisotropy observed in the inner core; Collaboration among several scientists to come up with a method of calculating the elasticity of iron in the inner core; ...
31 The professor said that light___ faster than sound.悬赏10,速答A:travels B:traveled C:travel D:traveled32 He asked___ for the computer. A:did I pay how much B:I paid how much C:how much did I pay D:how much I paid33 He asked, “How are you getting along?”He asked...