高中英語閱讀專項試題

時間：2024-07-09 21:06:15 英語閱讀我要投稿

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高中英語閱讀專項試題

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高中英語閱讀專項試題

　　高中英語閱讀專項試題原文：

　　Why do we have in a camera a lens(鏡頭)instead of a simple hole?

　　The reason can be seen from the figures(圖像).

　　In Figure 1, the hole is small. Rays of light from a point (P1)outside reach a very small part ofthe wall opposite, and we see there a small point. But when the hole is bigger, as in Figure 2,rays from the point(P2)can cover a larger part of the wall opposite, and we don't see a clearpoint, Rays from other points(Q) outside can also fall on the same place inside. Therefore thepicture is not clear when the hole is big and it is not bright when the hole is small because veryvery little light can pass through it.We can get better result with a lens. If the lens is made inthe shape shown in Figure 3, all the rays of light from the point(P3) are thrown on point(P')inside. The picture which we see, therefore, is clear, and it is also bright because more light canpass through a lens than through a small hole.

　　高中英語閱讀專項試題：

　　1. In Figure 1 we see a faint small point on the wall because ________.

　　A. the point(P1) is very small B. the hole isn't big enough

　　C. light rays don't travel in straight lines D. light rays can't pass through a small hole

　　2. Figure 2 shows that the bigger the hole is,_____________.

　　A. the more light can pass through B. the clearer the picture will be

　　C. the better result we will get D. the faster the light rays travel

　　3. From figure 3, we can see a lens __________.

　　A. can form a clear picture B. can make light go in a straight line

　　C. can help light rays to go faster D. cannot give the picture more light than in Fig. 2

　　4. The main idea of the second paragraph of the article is that __________.

　　A. a smaller hole is better than a bigger one