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  16
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] (3)
选项 A、some
B、great
C、few
D、little
答案 D
解析 语法题。[C]few和[D]little都可以用来表示“几乎没有”的意思，但是few一般用于修饰可数名词，little则用于修饰不可数名词。在原句中出现的是doubt这个不可数名词，所以[D]为正确答案。根据文意判断，空格中应该填入表示否定意思的限定词，[A]some和[B]great都表示肯定，不符合要求，排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3788992.html
相关试题推荐
随机试题
最新回复(0)