題目列表(包括答案和解析)
Scientists have devised a way to determine roughly where a person has lived using a strand (縷) of hair, a technique that could help track the movements of criminal suspects or unidentified murder victims. The method relies on measuring how chemical variations in drinking water show up in people’s hair.
“You’re what you eat and drink, and that’s recorded in your hair,” said Thure Ceding, a geologist at the University of Utah.
While U.S. diet is relatively identical, water supplies vary. The differences result from weather patterns. The chemical composition of rainfall changes slightly as rain clouds move.
Most hydrogen and oxygen atoms in water are stable, but traces of both elements are also present as heavier isotopes (同位素). The heaviest rain falls first. As a result, storms that form over the Pacific deliver heavier water to California than to Utah.
Similar patterns exist throughout the U.S. By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline. Each inch of hair corresponds to about two months.
Ceding’s team collected tap water samples from 600 cities and constructed a map of the regional differences. They checked the accuracy of the map by testing 200 hair samples collected from 65 barber shops. They were able to accurately place the hair samples in broad regions roughly corresponding to the movement of rain systems.
“It’s not good for pinpointing (精確定位),” Ceding said. “It’s good for eliminating many possibilities.” Todd Park, a local detective, said the method has helped him learn more about an unidentified woman whose skeleton was found near Great Salt Lake. The woman was 5 feet tall. Police recovered 26 bones, a T-shirt and several strands of hair. When Park heard about the research, he gave the hair samples to the researchers. Chemical testing showed that over the two years before her death, she moved about every two months. She stayed in the Northwest, although the test could not be more specific than somewhere between eastern Oregon and western Wyoming. “It’s still a substantial area,” Park said. “But it narrows its way down for me.”
1. What is the scientists’ new discovery?
A. One’s hair growth has to do with the amount of water they drink.
B. A person’s hair may reveal where they have lived.
C. Hair analysis accurately identifies criminal suspects.
D. The chemical composition of hair varies from person to person.
2. What does the author mean by “You’re what you eat and drink” (Line 1, Para. 3)?
A. Food and drink affect one’s personality development.
B. Food and drink preferences vary with individuals.
C. Food and drink leave traces in one’s body tissues.
D. Food and drink are indispensable to one’s existence.
3.What is said about the rainfall in America’s West?
A. There is much more rainfall in California than in Utah.
B. The water it delivers becomes lighter when it moves inland.
C. Its chemical composition is less stable than in other areas.
D. It gathers more light isotopes as it moves eastward.
4. What did Ceding’s team produce in their research?
A. A map showing the regional differences of tap water.
B. A collection of hair samples from various barber shops.
C. A method to measure the amount of water in human hair.
D. A chart illustrating the movement of the rain system.
5. What is the practical value of Ceding’s research?
A. It helps analyze the quality of water in different regions.
B. It helps the police determine where a crime is committed.
C. It helps the police narrow down possibilities in detective work.
D. It helps identify the drinking habits of the person under investigation.
Five years ago. I went to Shao Xing to visit my cousin. My grandpa had been outside smoking when my aunt called him into the house. He left his 36 on the front porch(門廊) steps so he could continue smoking it 37 he returned.
My cousin was 38 to see what smoking was really like,so he picked up the cigarette,put it in his mouth and puffed(吹) in 39 . Next,he was 40 his head off. He looked like he was about to throw up,but he stretched his hand out toward me to 41 me the cigarette. “Come on. Try it.”he said.
I just grabbed the stupid thing out of his hand and smashed it with my 42 .Then,grandpa returned. “Where’d my cigarette go?” he asked. I just stood there,not wanting to admit what I had done or what my 43 had done before that. But I knew that this was the moment of truth. I took a deep breath and began to 44 .
I told my grandpa that I couldn’t 45 believe he would choose to smoke. I was sure he knew how bad it was,so why did he do it? He said he started smoking when he was just a teenager. Now he was so 46 that he couldn’t stop. It was just too hard to 47 .
Here was an old man,my own grandpa. ,admitting there was something that he couldn’t control that was probably 48 killing him. I stood there in disbelief. dumbfounded(目瞪口呆的). Then I remembered this ad I had seen on TV: There was this lady who was so addicted(有癮的) to cigarettes that she’d gotten really sick. Doctors had to 49 a hole in her throat for her to 50 ,and she was still smoking through the hole! It was the most disgusting thing I’ve ever seen. Standing in front of my grandpa,I began to cry. 51 that happened to him?
Ever since that day, my grandpa has 52 on cigarettes. I know one thing: I want to live a long time. I don’t want to be 53 or out of control of my life the way 54 that lady was. I’ll never smoke. I’ll take 55 air.
36. A. cellphone B. cigarette C. book D. box
37. A. while B. if C. when D. though
38. A. curious B. glad C. surprised D. amazed
39. A. rain B. stone C. dust D. smoke
40. A. coughing B. shaking C. nodding D. waving
41. A. offer B. help C. supply D. warn
42. A. hand B. arm C. shoe D. toes
43. A. grandpa B. nephew C. brother D. cousin
44. A. comment B. explain C. excuse D. announce
45. A. hardly B. really C. exactly D. actually
46. A. applied B. devoted C. accustomed D. addicted
47. A. continue B. interrupt C. quit D. remain
48. A. slowly B. quickly C. frequently D. calmly
49. A. hit B. pat C. cut D. break
50. A. sleep B. eat C. smell D. breathe.
51. A. If only B. What if C. How about D. So what
52. A. cut across B. cut out C. cut back D. cut in
53. A. fearful B. sick C. shy D. worried
54. A. what B. which C. that D. how
55. A. simple B. light C. fresh D. heavy
“Good morning!” said a woman as she walked up to an old man sitting on the ground. The man slowly looked up. He was Jack, who had been begging around here for a couple of years.
“See that cafeteria(自助餐廳)over there?” she asked. “I’m going to get you something to eat and get you out of the cold for a while.”
She sat down at the table across from her amazed dinner guest. She stared at him intently. “Jack, do you remember me?” Old Jack thought hard and said, “I think so--I mean you do look familiar.”
“I was thin and hungry,” she said. “Maybe I’ve filled out now more than when you worked here. That was when I was just out of college. I had come to the city looking for a job, but I couldn’t find anything. Finally I was down to my last few cents and had been kicked out of my apartment. I walked in the streets for days, cold and hungry. I saw this place and walked in hoping that I could satisfy my hunger.”
Jack lit up with a smile. “Now I remember,” he said. “I was behind the serving counter. You came up and asked me if you could work for something to eat. I said it was against company’s policy.”
The woman continued, “Then you made me the biggest roast beef sandwich, gave me a cup of coffee, and told me to go over to a corner table and enjoy it. I was afraid that you would get into trouble. Then, I saw you put the price of my food in the cash register.”
“So you started your own business?” old Jack said. “I got a job that very afternoon. I worked my way up. Eventually I started my own business that, with the help of God, prospered.” She opened her purse and pulled out a business card. “When you are finished here, I want you to pay a visit to a Mr. Lyons, the personnel director of my company. He’ll find something for you to do around the office.” She smiled, “If you ever need anything, my door is always open to you.”
There were tears in the old man’s eyes, “How can I ever thank you?” he said. “Don’t thank me;” the woman answered, “thank yourself. It was your kindness that let me know you.”
【小題1】Why did the woman invite the beggar to dinner?
A.The beggar was once her friend. |
B.She felt very pity for the beggar. |
C.The beggar once offered her a free meal. |
D.She once worked with the beggar. |
A.wear a beautiful dress. | B.change one’s features. |
C.have a very high position. | D.become larger or fatter. |
A.find a job there | B.get herself out of cold |
C.get something to eat | D.meet with the man |
A.Kindness is an investment that never fails. |
B.Nothing is difficult for the man who will try. |
C.Don’t judge a person from his/her appearance. |
D.God helps those who help themselves. |
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