题目内容
（请给出正确答案）
A、move away
B、moving away
C、moves away
D、moved away
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“Incoherent light, like the light from the sun or the light bulb, （)from its source in all direction.”相关的问题
A.move away
B.moving away
C.moves away
D.moved away
It is from the sun ______ we get light and heat.
A.where
B.that
C.what
D.there
The moon merely _______ the light of the sun， like a huge mirror hung in the sky。
A. reflects
B. demonstrates
C. transmits
D. launches
(1)
Light from the sun can make both good weather and bad days.
A．True.
B．False.
The word laser 【C7】______ "light amplification by stimulated emission of radiation." To many people, lasers are very mysterious, but a laser is simply a 【C8】______ that produces a strong light. The light from the laser is called 【C9】______ light because it is light that only moves in one direction. 【C10】______ , incoherent light, like the light from the sun or light from a bulb, moves away from its source 【C11】______ all directions, so its strength is very spread out. The light from a laser, moving in only one direction and 【C12】______ in a narrow beam, is much stronger. Laser light is created by a 【C13】______ called stimulated emission. In this process, the atoms of a certain substance, such as a crystal or a gas, are excited 【C14】______ that they produce coherent light. A person working with a laser can aim this coherent light, 【C15】______ a laser beam, in any direction.
As soon as the laser was developed, scientists began thinking of practical applications 【C16】______ it. One of the earliest uses was to make extremely precise measurements of distance and speed. 【C17】______ , the distance to the moon was measured to within a foot, and the speed of light was measured to 【C18】______ a thousandth of a mile per second. As time 【C19】______ , many more applications for the laser were 【C20】______ .
【C1】
A．long
B．early
C．very
D．earlier
It can be inferred from the passage that the Sun's light travels
A．through solid objects in space
B．in many different directions
C．more slowly than scientists previously believed
D．further in summer than in winter
Not only ______ us light, but also it gives us heat
A．the sun gives
B．the sun does give
C．gives the sun
D．does the sun give
Most of the stars are much bigger than the moon, but they look smaller __22__ they are far away from the earth. At night, the moon is high in the sky like a light. But the moon has no light of its own . The light of the moon __23__ the sun. The sun gives us light, heat and life. And the plants, animals and men will die without the sun. The earth is going round itself __24__. When the part of the earth turns to the sun, it is day. The __25__ part of the earth is night.
The earth is our homeland. We should love it.
21)、
A.because
B.comes from
C.between
D.opposite
E.all the time
22)、
A.because
B.comes from
C.between
D.opposite
E.all the time
23)、
A.because
B.comes from
C.between
D.opposite
E.all the time
24)、
A.because
B.comes from
C.between
D.opposite
E.all the time
25)、
A.because
B.comes from
C.between
D.opposite
E.all the time
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