Which type of waves does radar use A.Sound.B.Heat.C.Radio.D.Light. 相关知识点: 试题来源: 解析 C [分析] 细节题型 根据文章介绍的雷达工作的基本原理,见文中第 行:With radar, however, the waves are radio waves instead of sound waves. (然而,雷达所使用的不是声波而是无线电波);因此选项C为...
A. Sound waves can travel in a vacuum. B. Sound waves are transverse waves. C. The speed of sound waves is constant. D. Sound waves need a medium to travel. 相关知识点: 试题来源: 解析 D。本题考查声音传播的条件。声音的传播需要介质,不能在真空中传播,A 选项错误;声音是纵波,B 选项错误...
百度试题 结果1 题目Air is the medium by which sound waves are ___. A. surveyed B. conveyed C. produced D. made 相关知识点: 试题来源: 解析 B 反馈 收藏
A. which was faster, sound waves or electricity B. whether Rose was cleverer than the boy C. whether she could call her brother in Washington D. whether her students could hear her from 20 metres away 相关知识点: 试题来源: 解析 A Miss Green希望她的学生们了解声波和电的速度比较。选项A...
During an experiment on sound waves, which property determines the pitch of a sound? A. Frequency B. Amplitude C. Wavelength D. Speed 相关知识点: 试题来源: 解析 A。频率决定声音的音调。B 选项振幅决定声音的响度;C 选项波长和 D 选项速度不是决定音调的主要因素。
Sound waves can travel through different media. Which of the following media will sound waves travel fastest in? A. Air B. Water C. Steel D. Vacuum 相关知识点: 试题来源: 解析 C。解析:声音传播需要介质,在固体中传播速度最快,在气体中最慢,真空不能传声。钢是固体,所以声音在钢中传播速度最...
A. Sound waves in air B. Water waves on the surface of a lake C. Waves in a slinky spring D. Seismic P-waves 相关知识点: 试题来源: 解析 B。水面上的水波是横波的例子。选项 A,空气中的声波是纵波。选项 C,弹簧中的波可以是纵波也可以是横波,不一定。选项 D,地震中的 P 波是纵波。反馈...
asomeone like you 某人喜欢您[translate] aHave fun! 获得乐趣![translate] awhich depends on sound waves thet hit something and go back to the dolphin to show where the food is 正在翻译,请等待...[translate]
百度试题 结果1 题目27 Four sound waves are displayed on the screen of a cathode-ray oscilloscope.Which sound wave gets louder and has a pitch that decreases? B AB CD 相关知识点: 试题来源: 解析 B 反馈 收藏
The waves crashed on the shore. Which onomatopoeia describes the sound of waves? A. splash B. crash C. whirr D. buzz 相关知识点: 试题来源: 解析 B。“crash”是海浪拍打海岸的声音。A 选项“splash”通常表示水溅起的声音;C 选项“whirr”通常表示机器转动的声音;D 选项“buzz”通常表示蜜蜂等...