1、How I Turned to Be OptimisticI began to grow up that winter night when my parents and I were returning from my aunts house, and my mother said that we might soon be leaving for America. We were on the bus then. I was crying, and some people on the bus were turning around to look at me. I remember th
2、at I could not bear the thought of never hearing again the radio program for school children to which I listened every morning.I do not remember myself crying for this reason again. In fact, I think I cried very little when I was saying goodbye to my friends and relatives. When we were leaving I tho
3、ught about all the places I was going to seethe strange and magical places I had known only from books and pictures. The country I was leaving never to come back was hardly in my head then.The four years that followed taught me the importance of optimism, but the idea did not come to me at once. For
4、 the first two years in New York I was really losthaving to study in three schools as a result of family moves. I did not quite know what I was or what I should be. Mother remarried, and things became even more complex for me. Some time passed before my stepfather and I got used to each other. I was
5、 often sad, and saw no end to “the hard times”.My responsibilities in the family increased a lot since I knew English better than everyone else at home. I wrote letters, filled out forms, translated at interviews with Immigration officers, took my grandparents to the doctor and translated there, and
6、 even discussed telephone bills with company representatives.From my experiences I have learned one important rule:almost all common troubles eventually go away!Something good is certain to happen in the end when you do not give up, and just wait a little!I believe that my life will turn out all rig
7、ht, even though it will not be that easy.1. How did the author get to know America? A. From her relatives. B. From her mother. C. From books and pictures. D. From radio programs.2. Upon leaving for America the author felt _. A. confused B. excited C. worried D. amazed3. For the first two years in Ne
8、w York, the author _. A. often lost her way B. did not think about her future C. studied in three different schools D. got on well with her stepfather (2) 科普类 Seeing in Stereo Have you wondered why you have two eyes and why they are set close together on the front of your face? The reasons are simpl
9、e and important to the way you see the rest of your world Your eyes are like two small camerasA camera catches an image(影像)of an object and records it on filmSimilarly,when you look at something,each eye takes in what it sees and sends this image to the back of the eyeballBecause your eyes are set c
10、lose together,they view the world from about the same height but from slightly different anglesWorking as a team,the eyes send the images to your brain,which puts them together into a single,centered image Seeing in stereo means seeing with two eyes working together,which is called stereoscopic sigh
11、tThis allows you to view the world in three dimensions,or 3-DSeeing depth helps you to judge the distance between you and the objects you see and to adjust to the changing angle at which you see something as you move closer to or farther away from itIf images are coming from only one eye, however,on
12、ly two of these dimensions-height and width-can be perceivedA world seen with one eye is thus two-dimensional,as in a photograph Now consider why your two eyes are on the front of your faceThink of other animals with this same arrangementThey are all animals that hunt,like lions and wolvesTheir eyes
13、 face directly in front of themThis provides a field of sight about 180 degrees wide,which is called binocular sightOn the other hand,animals that are hunted have eyes on the sides of the head,which Provides nearly 360-degree field of sightIn order to stay alive,they need to see things coming from t
14、he sides and from behindHowever,without stereoscopic sight,they have difficulty determining how far a danger is With sight both stereoscopic and binocular,humans share with animal hunters the ability to see from side to side and to accurately determine the distanceIf you think it would be great to h
15、ave another type of sight,perhaps with hundreds of tiny eyes like many insects do,think again! Each tiny insect eye sees only a tiny partBesides,what if you needed glasses? Be glad for the eyesight that you have1According to the passage,an eye is like a camera because both A. can record images B. ca
16、n imagine objects C. provide centered images D. work at the same height2Stereoscopic sight is a result of having A. a three-hundred-sixty-degree field of sightB. hundreds of eyes,all seeing parts of an imageC. two eyes close to one another that work togetherD. one eye on either side of the head,each seeing a different image3The u
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