2. 外语
  3. 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)____

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)____

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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.
(16)
选项 A、diffused
B、spread
C、scattered
D、separated
答案A
解析 动词辨析题。[A]diffuse的意思是“散开”，尤指光线、声音或气味在空气中传送或散开，为正确答案。[B]spread“延伸，蔓延”，侧重“遍及”这个含义；[C]scatter指人或物四处“散开”；[D]separate是“区分，脱离”的意思，均可以排除。
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