问题 填空题

岸边的人看到池中鱼的位置比它的实际位置要______(填:“深”或“浅”).潜在河水中的人,看岸边的树,比它的实际位置要______(“高”或“低”).这都是由于光的______造成的.

答案

鱼反射的光线从水中斜射到空气中发生折射,折射光线远离法线,向下偏折,所以人眼逆着折射光线看上去,看到的鱼的像比鱼的实际位置浅.

潜水员在水下看见岸上的树,是树反射的光斜射到水面时,发生折射进入水中后靠近法线,进入潜水员眼睛,而潜水员逆着光的方向看上去形成的虚像,所以潜水员在水下看河岸上的树比实际位置要高一些;

故答案为:浅;高;折射.

完形填空

Mr. Johnson 1____ a factory. He once 2_____ on TV that animals could be taught to 3_____ some work for people if they were given 4_____ to eat. He 5______the idea. He 6_____ it would be 7______ to have a dog look after his 8_____ and an elephant do some heavy jobs 9______ his factory. He bought a dog 10 ______an elephant in the market and decided to teach them to do some work 11_____ him. Of course. he 12______bought a lot of food for them. Several 13_____ later,the dog and the elephant 14 ______fatter and fatter,but they 15_______ do any work for him. At last,Mr. Johnson had to give up.

小题1:A. have            B. had               C. work

小题2:A. saw             B. asked             C. met

小题3:A. make            B. do                C. 1et

小题4:A. someone          B. nothing           C. something

小题5:A. loved            B. disliked            C. hated

小题6:A. told              B. thought             C. talked

小题7:A. bad              B. good              C. 1ate

小题8:A. house            B. shirt              C. eyes

小题9:A. in               B. above               C. under

小题10:A. but              B. or                  C. and

小题11:A. for               B. to                  C. of

小题12:A. also              B. never               C. yet

小题13:A. years            B. hours               C. months

小题14:A. smelt            B. sounded             C. became

小题15:A. mustn’t            B. couldn’t            C. shouldn’t

单项选择题