更多"Because light travels (fast)______ "的相关试题:
[填空题]Because light travels (fast) ______ than sound, lightning is seen before thunder is heard.
[填空题]Due to the fact that light travels______(fast)than sound,lightning is seen beforethunder is heard．
[单项选择]Light as it comes from the sun is a mixture of light of many different colors.（）
A. 太阳光是不同颜色的光的混合物。
B. 太阳光是由多种颜色的光混合而成。
C. 来自太阳的光是由多种颜色的光组合而成。
D. 由多种颜色的光混合而成称为阳光。
[单项选择]Light travels very fast. It moves at a speed of 300,000 kilometers a second. Light reaches us from the moon in less than a second and a half. The moon is about 382,000 kilometers away.
Light from the sun reaches us in 8.5 minutes. The sun is about 149,840,000 kilometers from the earth.
The other stars are farther away than the sun. Light from the nearest star reaches us in about four years. When you look at a star, you do not see its present condition. You see it as it used to be. Light from some stars takes hundreds of years to reach us. We never see a star as it is now. We see it as it was long ago; perhaps hundreds of thousands of years ago.
Astronomers (天文学家) watch the stars through big telescopes. The world’s biggest telescope is in Russia. The next biggest is in-the United States. With these great telescopes astronomers can see stars and other things very far away. Some of these things are not only stars. They are great groups of stars.
The light of the sun reac
A. more time than
B. less time than
C. as much time as
D. less years than
[单项选择]Physics is a science dealing with sound, light, heat, electricity, magnetism (磁性), the properties of matter and what it is composed of.（）
A. 物理学是一门研究声、光、热、电、磁、物质性质和物质组成的科学。
B. 物理学是一门科学，它涉及声学、光学、热力学、磁学、物质性质和结构。
C. 物理学是专门研究声、光、热、电、磁、物质性质和物质组成的科学。
D. 物理学领域包括声、光、热、电、磁、物质性质和物质组成的科学。
[简答题]Sound travels four times faster in water than in the air.
[单项选择]A light sleeper is usually very （）to any sound even as inaudible as the humming of a mosquito.
A. acute
B. keen
C. alert
D. immune
[单项选择]Mary is as fast as, if not faster than, anyone in her class and should be on the team.
A. as fast, if not faster than, anyone else
B. as fast as, if not more fast than, anyone
C. as fast as, if not faster than, anyone else
D. as fast, if not faster than, anyone
[填空题]Production went up (fast)（）in June than it did in the previous month.
[填空题]Due to the fact that light travels ______ (fast) than sound, lightning is seen before thunder is heard.
[单项选择]Light is different ______ sound ______ the way it travels.
A. in, from
B. of, to
C. by, for
D. from, in
[单项选择]It’s never easy for a mighty military to tread lightly on foreign soil. In the case of American forces in South Korea, protectors of the nation’s sovereignty since the Korean War, the job is made doubly difficult by local sensitivities arising from a history of foreign domination. So when a few GIs commit particularly brutal crimes against the local populace, it’s easy for some South Koreans to ask. Who will guard us from our guardians
That kind of questioning grew more insistent on January 20, when police found the body of a 30-year-old Korean woman, Kang Un-gyong, in the apartment she shared with her American boyfriend. An autopsy showed Kang, who had bruises over most of her face and chest, died after being hit on the back of her head with a blunt object. Her boyfriend, Henry Kevin McKinley, 36, an electrician at the United States military base in Seoul, admitted beating her. McKinley said he pushed Kang, who then struck her head on a radiator, but denied that he tried to murde
A. the American servicemen are constantly advised to restrain themselves
B. the South Koreans don’t blame the GIs as a whole because "McKinley is a civilian employee of the U. S. military forces in South Korea
C. the U. S. commanders in South Korea admit that the sole responsibility lies with their servicemen
D. the U. S. forces in South Korea do not take the Mckinley case seriously because of the privileges they are entitled to according to the Status-of-Forces Agreement between Washington and Seoul
