首页
登录
职称英语
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
41
管理
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] (17)
选项
A、back
B、in front of
C、behind
D、beside
答案
C
解析
介词辨析题。按照常理和句式推断,空格中填入的介词应该与before相对,[C]behind是介词,表示“在……之后”,所以[C]为正确答案。[B]in front of“在……前面”和[D]beside“在……旁边”不符合文意,可以排除;[A]back是副词,一般不直接连接宾语,故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3789006.html
相关试题推荐
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
Thenatureoflightisnotwhollyknown,butitisgenerallybelievedtobe
随机试题
Whilethetotalnumberoffarmersengagedinagriculturalproductionisbarelyh
Ateamofinternationalresearchershasfoundnewevidencethatanendangered
[originaltext]TodayIwouldliketocontinueourdiscussionofearlyAmeric
Nuclearpowerisdangeroustohealth,safetyandevenlifeitself.Thedange
机械单机核算方法可分为()几种形式。A.单项核算 B.逐项核算 C.大修间
眼球在原在位时,上斜肌收缩的主要作用和次要作用是A.使眼球内旋,下转及外转 B
肩外展固定性矫形器叙述正确的是A.肩外展70°~90°、前屈15°~30°,肘关
雌激素可促使子宫发育,肌层增厚( )
某妇,60岁,绝经12年,少量不规则阴道流血3次,查外阴较丰满,阴毛较多,阴道松
采用预裂爆破法施工隧道时,其分区起爆顺序为()
最新回复
(
0
)