2. 职称英语
  3. The nature of light is not wholly known, but it is generally believed to be

The nature of light is not wholly known, but it is generally believed to be

游客2024-10-06  14
问题     The nature of light is not wholly known, but it is generally believed to be matter, as in its(1)______, it obeys the laws(2)______matter. So closely is it connected with heat and electricity that there can be (3)______ doubt of their all being(4)______ different modifications of the same substance. The effects of light(5)______ other bodies and how light is affected by them(6)______ some important principles.
    Rays of light are reflected from one surface to(7)______. It is by this reflection of light that objects are(8)______ visible. However, unless light falls directly(9) ______the eye they are invisible, and are not(10)______felt until after a certain series of operations upon the various coverings of the eye. Smooth and(11)______surfaces reflect light most powerfully, and send to the eye the images of the objects (12)______ the light proceeded before reflection. Glass would be of no use to us as a mirror, were it not first(13)______on one side, interrupting the rays in their(14)______from the glass into the air. The reason why trees, rocks and animals are not all mirrors is that their surfaces are(15)______, and rays of light reflected from such a surface are(16)______in every direction. Stand before a mirror and your image is formed and appears to be as far(17)______the glass as you are before it. Rays of light(18) ______reflected at the same(19) ______at which they fall upon a mirror, two persons can stand in (20)______ position that each can see the image of the other without seeing his own. [br] (1)
选项 A、actions
B、moves
C、motions
D、motives
答案 C
解析 名词辨析题。[B]moves和[C]motions都有“运动”的意思，但是move强调开始的行动或变化，而motion指不处于静止状态而在移动的过程中，强调运动本身，而不涉及其动因。原文的意思是“在运动中”，强调运动本身，因此[C]为正确答案。[A]actions的意思是“(人的)行动，活动”，这里说的是光线的运动，故排除；[D]motives的意思是“动机，目的；主题”，不符合文意，排除。
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