Passage Two Look at a man walking down a street or road in’ the sunlight and you will see his shadow. If you watch two men walking in the sunlight and carrying a six-fool pane(窗玻璃片) of glass between them, you will see each man six feet apart, but there will be no shadow of the pane of glass. Shadows are easily explained since we know that light travels in a straight line. We also know that light waves pass through some bodies and not through others. When light strikes a body and passes through it unchanged, we call such a body or material transparent. Most glass is such a material, especially window glass, and it is for this reason that we do not see the shadow of the window pane which the men are carrying. Do you know of any other transparent materials The most common one, with which we are familiar, is air. Another is clear water. On the other hand, some materials do not let light pass through them at all. They stop the light waves just as you would-catch a ball th
A. a short story
B. a popular science reading
C. a common knowledge in routine life
D. an essay
Passage Two Look at a man walking down a street or road in’ the sunlight and you will see his shadow. If you watch two men walking in the sunlight and carrying a six-fool pane(窗玻璃片) of glass between them, you will see each man six feet apart, but there will be no shadow of the pane of glass. Shadows are easily explained since we know that light travels in a straight line. We also know that light waves pass through some bodies and not through others. When light strikes a body and passes through it unchanged, we call such a body or material transparent. Most glass is such a material, especially window glass, and it is for this reason that we do not see the shadow of the window pane which the men are carrying. Do you know of any other transparent materials The most common one, with which we are familiar, is air. Another is clear water. On the other hand, some materials do not let light pass through them at all. They stop the light waves just as you would-catch a ball th
A. Light waves are beams of light.
B. Light waves can penetrate any materials except men' s bodies.
C. Light waves can penetrate transparent materials.
D. Light waves can penetrate some materials.
Passage One
A few minutes ago, walking back from lunch, I started to cross the street when I heard the sound of a coin dropping. It wasn’t much hut, as I turned, my eyes caught the heads of several other people turning too. A woman had dropped what appeared to be a dime.
The tinkling sound of a coin dropping on pavement is an attention-getter. It can be nothing more than a penny. Whatever the coin is, no one ignores the sound of it. It got me thinking about sounds again.
We are besieged by so many sounds that attract the most attention. People in New York City seldom turn to look when a fire engine, a police car or an ambulance comes screaming along the street.
When I’m in New York, I’m a New Yorker. I don’t turn either. Like the natives. I hardly hear a siren there.
At home in my little town in Connecticut, it’s different. The distant wail of a police car, an emergency vehicle or a fire siren brings me
A. They make him feel at home.
B. He thinks they should be ignored.
C. He believes they are part of our lives.
D. He prefers silence to loud noises.
我来回答: