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
18
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] (18)
选项
A、/
B、are
C、were
D、be
答案
A
解析
语法题。因为这个长句的主干部分是“two:persons can stand in…”,空格所在的部分属于伴随结构,所以不能出现are,were或be这样的动词时态,但是可以不填,直接用reflected这个过去分词表示“被反射的(光线)”,所以正确答案为[A]。
转载请注明原文地址:https://tihaiku.com/zcyy/3789007.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
NarratorListentopartofadiscussioninaphysicsclass.Theprofessorisdis
Whethertheeyesare"thewindowsofthesoul"isdebatable;theyarein-(1
Aestheticthoughtofadistinctivelymodernbentemergedduringthe18thcen
Forthispart,youareallowed30minutestowriteanessayonhowtoguarantee
Alargepartofeffectiveleadershipisdependentonsomethingcalled"style"
计算题:根据所给材料计算后回答问题。(须列出算式;计算过程中的小数均保留实际位数
人的性成熟最快的关键阶段是()A.小学时期 B.中学时期 C.大学时
流动性风险特性中的()体现在流动性风险具有高冲击和快蔓延的特性。A.传染性
疫区分为( )。 A.动物传染病疫区 B.植物疫区 C.人类传染病疫区
男孩,5岁。反复咳嗽3个月,常于夜间咳醒,活动后加重,痰不多,无发热,使用抗生素
最新回复
(
0
)