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2023-11-10  83
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] (7)
选项 A、other
B、the others
C、the other
D、another
答案 D
解析 代词辨析题。[D]another指的是不定数目中的另一个，符合文意，所以正确答案是[D]。[A]other表示“其余的”，一般用于the或物主代词之后，因此排除；[B]the others所指的是复数概念，根据常识，光线不是从一个表面被反射到多个表面，因此排除；[C]the other表示的是两个人或事物中的另一个，排除。
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