The speed of radio waves is equal tolight.A.thatB. that ofC. this ofD. those ofof the engineers in this institute has a personal computer.A.BothB.EachC.Every 答案 7.【答案】B【核心短语/词汇】the speed of ...的速度;be equal to和...相等【翻译】无线电波的速度和光的速度相等。【解析...
A unit used to measure the frequency of vibrations and waves. One hertz is equal to one cycle per second. Radio waves are usually measured in megahertz, or millions of hertz. The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Pu...
百度试题 结果1 题目The speed of radio waves is equal to ___ light. A. that B. that of C. this of D. those of 相关知识点: 试题来源: 解析 B. that of 反馈 收藏
百度试题 结果1 题目The speed of radio waves is equal to ___of light.A. those B. that C. the one D. the ones 相关知识点: 试题来源: 解析 B 满分:4 分正确答案:B 反馈 收藏
Light waves are also used extensively in communications technology, with high-frequency waves such as radio waves and microwaves being used for things like Wi-Fi signals and cell phone transmissions. In addition, scientists are actively exploring the potential of using lower-frequency waves like infra...
The wavelengths of light and radio waves, unlike high energy gamma radiation, are much shorter. A. true B. false 相关知识点: 试题来源: 解析 B 正确答案:B 解析:比较结构的理解。本题要求听者分辨清所比较之物及其对比关系。原文谈到nuclear energy(核能)时,将其解释为high energy gamma radiation(...
Radio waves traveling at the speed of light ___their discoveries to Earth. A. have brought B. are brought C. bringing D. is bringing 相关知识点: 试题来源: 解析 A 正确答案:A 解析:The present perfect verb have brought is the only answer that fits the meaning of the sentence. 知识模块...
百度试题 结果1 题目The speed of radio waves is equal to___of light.无线电波的速度等于光速的 B) that那相关知识点: 试题来源: 解析 B 反馈 收藏
百度试题 题目The speed of radio waves is equal to ___ light.A.thatB.that ofC.this ofD.those of 相关知识点: 试题来源: 解析 B 反馈 收藏
Also called visible light. b. Electromagnetic radiation of any frequency or wavelength. 2. The sensation of perceiving light; brightness: a sudden light that made me blink. 3. a. A source of light, especially a lamp, a lantern, or an electric lighting fixture: Turn out the lights when ...