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2．It′seems to be strange to you there is a blind spot（盲點 ）on the eyes．Here is a n interesting experiment（實驗） that can make something disappear，when one eye is open．
     Make a card about the size of a postcard and write two English letters L and R on it，L on the left and R on the right，F(xiàn)irst，hold the card about 80 cm away and you see both the letters．Then close your right eye and look at the letter R only with your left eye．And now．as you move the card slowly towards you．you'll find the letter L disappearing．But if you move the
 card nearer to your face，the letter will be seen again，Now do the same experiment with yourLeft eye closed，you'll find the letter R disappearing，
     Why does the letter disappear？It is because there is a blind  spot on the eye．When the  image（影像） or the letter falls on the blind spot，it won't be seen．That is why either of the  letters disappears．
66．The writer of the passage thinks  thatBthere is a blind spot on the eye．
A．no one knows                 B．few people know
C．most people know              D．all the people know
67．The word"disappear"in the passage means．in Chinese．D
A．遺失          B．驅散            C．消散            D．消失
68．You fail to see the letter L in the experiment becauseC
A．you cannot open your eyes                    B．your right eye is blind
C．its image falls on the blind spot            D．your eyes are too poor
69．In which order（順序） should you do the experiment？⑥④①③⑤②
①Hold the card  ②Move the card nearer  ③Close your right eye
④Write two English letters  ⑤Look at the letter R ⑥Make a card
70，The passage mainly （主要） tells usA
A．there is blind spot on the eyes         B．a boring experiment
C．an interesting story                    D．when to find the blind spot．

分析 這篇短文作者通過一個實驗，告訴了我們在我們的眼睛上有一個盲點，并重點解釋了造成這一現(xiàn)象的原因．

解答 答案：66．B  細節(jié)理解題．根據第一段句子It seems to be strange to you that there is a blind spot （盲點）on the eyes．你似乎覺得很奇怪，在眼睛上有個盲點，可知很少有人知道眼睛上有盲點．故選B．
67．D   詞義猜測題．根據下文But if you move the card nearer to your face，the letter will be seen again，但如果你移動卡片靠近你的臉，將再次看到字母，可知上文說的是當你慢慢地向你移動卡片，會發(fā)現(xiàn)字母L消失．所以此處disappear指的是讓某物消失，故選D．
68．C   細節(jié)理解題．根據最后一段第一行句子When the image （影像） of the letter falls on the blind spot，it won't be seen．當這個字母落在盲點上的時候，它將不能被看到．故選C．
69．⑥④①③⑤②細節(jié)排序題．根據第二段內容及其第一、二行句子Make a card about the size of a postcard and write two English letters L and R on it，做一個明信片大小的卡片，然后寫上兩個英文字母L和R．hold the card about 80 cm away．控制卡片大約80厘米遠．Then close your right eye and look at the letter R only with your left eye．然后閉上你的右眼只用左眼看這個字母R．as you move the card slowly towards you．你慢慢的朝你移動卡片．可知正確順序是⑥④①③⑤②．故答案為⑥④①③⑤②．
70．A 主旨歸納題．根據這篇文章內容及其第一段句子It seems to be strange to you that there is a blind spot （盲點）on the eyes．你似乎覺得很奇怪，在眼睛上有個盲點．可知這篇短文主要告訴了我們在我們的眼睛上有一個盲點，故選A．

點評 做題時首先對原文材料迅速瀏覽，掌握全文的主旨大意．其次，細讀題材，各個擊破．掌握全文的大意之后，細細閱讀材料后的問題，弄清每題要求后，帶著問題，再回到原文中去尋找、捕獲有關信息．

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