A microscope is a useful instrument for observing small objects. By producing a bigger image, the microscope reveals details that are undetectable to the naked eye(裸眼).
Before using the microscope, please read the instructions below.
CAUTION: Microscopes are both delicate and expensive and must be handled with care.
1. Always carry the microscope with two hands — one supporting the base and the other on the arm.
2. Avoid stretching the wire of the lamp across a walkway.
3. Keep the stage clean and always use a glass slide for specimens(樣本).
4. To avoid crushing the glass slide when focusing, begin with the lens close to the specimen and gradually back off to focus.
5. Keep the microscope covered to prevent the dust while it is being stored.
HOW TO USE THE MICROSCOPE:
1. Plug(接通電源) in the lamp.
2. Place a sample of what you wish to observe on a slide.
3. Adjust the mirror so it reflects light from the room up into the objective lens. When the mirror is correctly adjusted, a complete circle of light iwll appear when you look through the eyepiece.
4. Place your slide with the specimen directly over the center of the glass circle on teh stage. If it is a wet slide, be sure the bottom of the slide is dry.
5. With the LOW POWER objective leans placed over the slide, use the coarse focus knob to lower the lens to the lowest point.
6. Look through the eyepiece with one eye while closing the other eye. Slowly raise the lens until teh focus is relatively clear.
7. Use the fine focus knob to fine -tune(微調)the focus.
8. Without changing the focus knobs, switch to the HIGH POWER objective lens. Once you have switched to HIGH POWER, use only the fine focus knob to make the image sharper.
1.Which of the following is the correct way to use a microscope according to the text?
A．Use one hand to carry the microscope
B．Place a sample directly on the clean stage
C．When stored, the microscope should be adjusted.
D．Look through the eyepiece with one eye.
2.If you want to observe a thin piece of hair, which of the following should you do first.?
A．Switch to objective lens. B．Adjust the mirror.
C．Look through the eyepiece. D．Place the hair on a glass slide.
3.According to the text, you could see a complete circle of light _____.
A．after correctly adjusting the mirror
B．while looking at the specimen on a glass slide
C．after slowly raising the objective lens
D．before positioning the mirror correctly
1.D
2.D
3.A
【解析】
試題分析：本文主要介紹了顯微鏡的使用注意事項以及具體如何使用的方法。
1.D 細節題。根據第6點Look through the eyepiece with one eye while closing the other eye. Slowly raise the lens until teh focus is relatively clear.說明要用單眼來觀察，故D正確。
2.D 細節題。根據第2點Place a sample of what you wish to observe on a slide說明D正確。
3.A 細節題。根據第3點Adjust the mirror so it reflects light from the room up into the objective lens. When the mirror is correctly adjusted, a complete circle of light iwll appear when you look through the eyepiece.說明調整鏡子以后就可以看見了一個完整的圓圈了，故A正確。
考點：考查科普類短文閱讀
點評：本文主要介紹了顯微鏡的使用注意事項以及具體如何使用的方法。本文屬于科普類短文，此類文章的最大的障礙是詞匯以及考生對閱讀內容的不熟悉，需要考生在閱讀的時候有足夠的耐心。要養成在上下文串聯中猜測詞義的能力，根據上下文中出現的同義詞，近義詞，反義詞，以及詞義的解釋來理解生詞。同時要抓住文章的中心，不要受其他信息的影響。要根據題目及選項以及文章的上下文串聯合理的判斷推理。
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I sometimes wonder if old Finchley has the right personality to be a research scientist. He keeps asking when he’ll be coming back. After all, it was his own fault. Nobody tries out what has just been invented on themselves any more but Finchley. Well, he must have pumped about a thousand cubic centimeters into himself before I noticed he was clearly becoming smaller.
It was funny watching him, because his clothes remained the same in size. They simply piled up around him so that he looked like a small boy in his father’s clothes. But he kept getting smaller and smaller. As my colleague Dawson and I watched him, he disappeared! All we could see was Finchley’s clothes on the floor. They looked so strange, because the lab coat was on top, shirt and trousers inside and, I suppose, underclothes inside again. It gave me a strange feeling, and I think Dawson was a bit shaken, too.
Dawson was sitting on his chair in front of a microscope he’d been using to examine a family of mites(螨蟲). He looked through the scope kind of absently again, and was nearly scared to lose awareness when he found old Finchley waving back from the other end.
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Finchley disappeared because ________.
A. he took something poisonous
B. he was changed into a dust mite
C. his father’s clothes totally covered him up
D. what he and his colleagues invented resulted in his disappearance
It frightened Dawson to see Finchley _______.
A. got into his scope by accident B. was waving through his telescope
C. suddenly got lost in his clothes D. gradually disappeared in the lab
It can be inferred that Finchley, Dawson and the writer have possibly invented _____.
A. some kind of medicine B. a new powerful microscope
C. a machine to make people small D. a new way to make a culture of mite
It can probably be concluded that Finchley ________.
A. passed out there and then B. is not fit to be a scientist
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It was funny watching him, because his clothes remained the same in size. They simply piled up around him so that he looked like a small boy in his father’s clothes. But he kept getting smaller and smaller. As my colleague Dawson and I watched him, he disappeared! All we could see was Finchley’s clothes on the floor. They looked so strange, because the lab coat was on top, shirt and trousers inside and, I suppose, underclothes inside again. It gave me a strange feeling, and I think Dawson was a bit shaken, too.
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A. he took something poisonous
B. he was changed into a dust mite
C. his father’s clothes totally covered him up
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A. got into his scope by accident B. was waving through his telescope
C. suddenly got lost in his clothes D. gradually disappeared in the lab
It can be inferred that Finchley, Dawson and the writer have possibly invented _____.
A. some kind of medicine B. a new powerful microscope
C. a machine to make people small D. a new way to make a culture of mite
It can probably be concluded that Finchley ________.
A. passed out there and then B. is not fit to be a scientist
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| B．treasure their lifetime to fulfill their own business |
| C．know a sorrowful experience of his won |
| D．know how he treasured his family. |
| A．He prepared everything in order. | B．He had a biopsy. |
| C．His pancreatic cancer can be curable with surgery. | D．His wife helped him. |
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| B．he could leave death alone and had enough courage to become what he wanted to. |
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Have you ever been ill? When you are ill, you must be unhappy because your body becomes hot, and there are pains all over your body. You don’t want to work, and you stay in bed, feeling very sad.
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D. Germs are everywhere around us.
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B. Making very big things look much smaller.
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58. Why don’t your parents let you drink dirty water?
A. You haven’t looked at it carefully.
B. Water can’t be drunk in this way.
C. There must be lots of germs in it.
D. Water will make you ill.
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A. Germs can be found both in water and in the air.
B. Germs can go into your finger if it is cut.
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