2014北京朝阳区二模英语试题答案【word】(4)

2. Place a specimen on a slide.
3. Adjust the mirror so it reflects light from the room up into the objective lens.
4. Place your slide with the specimen directly over the center of the glass circle on the stage. If it is a wet slide, be sure the bottom of the slide is dry. 
5. With the LOW POWER objective lens 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 the focus is relatively clear. 
7. Use the fine focus knob to make very small changes to 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.


56. When using a microscope, you should use a glass slide for specimens to ______.

A. keep the stage clean

B. avoid pressing the lens

C. prevent the buildup of dust

D. support the base and the arm

57. When observing onion cells on a slide, which of the following should you do first?

A. Lower the lens.

B. Adjust the mirror.

C. Turn the fine focus knob.

D. Look through the eyepiece.

58. What is the main purpose of this passage?

A. To show the reader the various parts of a microscope.

B. To persuade the reader to buy this type of microscope.

C. To instruct the reader how to use a microscope with care.

D. To show the reader some advantages of using a microscope.

B
When I first entered college, I was afraid that I was not “up to it”. I was afraid of being away from my family for the first time. Here I would have to make friends with strange people and perhaps also compete with them for grades in courses I would take. Were they smarter than I was? Could I keep up with them? Would they accept me?
I soon learned that my life was now up to me. I had to set a study program if I were to succeed in my courses. I had to regulate the time I spent in my study and socializing. I had to decide when to go to bed, what to eat, and with whom to be friendly. These questions I had to answer for myself.
At first, life was rough. I made mistakes in how I used my time. I also made mistakes in how I chose my first friends in college. Shortly, however, I had my life under control. I managed to get myself to class on time, do my homework and hand them in, and pass my first exams with satisfying grades. In addition, I developed a circle of friends with whom I felt comfortable and could share my fears. I set up my own routine, one that really met my needs. 
As a result, I began to look upon myself from a different perspective (视角). I began to see myself as a person responsible for myself and responsible for my friends and family. It felt good to make decisions and see them turn out to be wise ones. I guess this is what people call “growing up”. 
What did life have in store for me? At that stage in my life, I was really uncertain where I would go and what I would do with the years ahead of me. But I knew I would be able to handle what was ahead because I had successfully overcome the major problem in my life: I had made the change from a person dependent on his family to a person who was responsible for himself. 


59. The author was anxious about his college life at first because ______. 

A. he hated to get on with strangers

B. he lacked some specialist knowledge

C. he was at a loss in the new surroundings

D. he was afraid of making mistakes in front of others

60. We can learn from the author’s early experience at college that ______.

A. he got used to the new life without much trouble

B. he lost the ability to handle things independently

C. he came to realize he should be in charge of his own business

D. he was a failure in many aspects except in school performance

61. The author’s college life finally brought him a sense that ______.

A. he became a person caring for others

B. he was smarter than his fellow students

C. he brought confidence back in making decisions

D. he could deal with his personal matters independently

62. Which is the best title for the passage? 

A. Memories of My Time in College	B. College: A Turning Point in My Life
C. My Colorful College Life	D. College Life Brings Me Pressure

C
How Much Exercise Do I Need?
When it comes to exercise, less is not more—but it’s certainly better than none. Physical inactivity accounts for as many as 23 percent of all deaths from major chronic (慢性的) diseases, yet almost one of every three Americans is sedentary (spending a lot of time sitting down). According to the Centers for Disease Control, 29.4 percent of those surveyed (调查) report they have no free-time physical activity at all. City people tend to be more active than country folks, with 27.4 percent saying they are sedentary, compared with 36.6 percent of those in rural areas.