A person’s calorie requirements vary ________
his life.
A) across B) throughout C) over D) within
his life.
A) across B) throughout C) over D) within
第2题
Write your essay on the Answer Sheet in 200-250 words.(30 points)
An English person recently came to your school to give a talk(what was the talk
about?).
He/She left a personal possession (what is it?)at the school(}cuhere exactly?). You
want to return the possession(how will you return it?)but you have had difficulty
contacting the person (howhave you tried to contact him/her?). You have a possible address for the person, but you're not sure if it's correct (why?).
Write a letter to the person.
.Thank them for coming to give the talk.
.Explain the situation.
.Ask them to contact you.
第3题
Passage Five
In America, every student in his or her second year of high school is required to take a class in driver's education.
The course is divided up into two parts: class time for learning laws and regulations and driving time to practice driving. Each student is required to drive a total of six hours. The students are divided up into groups of four. The students and the instructor go out driving for two hour blocks of time. Thus, each student gets half an hour driving time per outing. Drivers Ed cars are unlike other cars in which they have two sets of brakes, one on the driver's side and one on the other side where the instructor sits. Thus, if the student driver should run into difficulties the instructor can take over.
After a student has passed the driver's education course and reached the appropriate age to drive (this age differs in every state but in most cases the person must be 16 years old), he must take his driver's test. The person must pass all three tests in order to be given a driver's license. If the person does well in his or her driver's education class, he or she will pass the test with flying colors and get a driver's license.
51. In America, the driver's course mentioned above______.
A. is considered as part of the advanced education
B. is given to anyone wanting to get a driver's license
C. is carried on after students graduate from high school
D. is offered to all the students of Grade 2 in high school
第4题
For many years, humans have tried to find the secret to staying young. Although it has yet to be discovered, we may be closer than ever to finding a way that can slow down the aging process. A recent study by researchers from Duke L Jniversity in the US found that cutting one sdaily intake of calories could slow down biological aging, which means you might be able to hang on to your youthful looks a little longer. Previous research has shown that calorie restrictions slow aging in worms, flies and mice. So researchers wondered if it could have the same effect on people.To find out, Daniel Belsky and her teamTo find out, Daniel Belsky and her team examined data from a study by the National Institute on Aging, based in the US, which involved 220 people. During the two-year study, 145 people in the restriction group cut their calorie intake by 25 percent. Meanwhile, 75 peoplein the control group maintained their normal diets.At the start of the study, the two groups had no difference inbiological age.The average participant was 38 years old, with a biological age of 37. However, after each 12- month period, participants in the restriction group saw an increase in biological age by an average of 0.1 1years. Meanwhile, those in the control group saw a rise by an average of 0.71 years. The researchers believe the difference between these groups shows that cutting calories does slow biological aging. Although they didn't explain the reason behind this, researchers at Brigham Young University in the US provided an explanation after they carried out a similar study on mice. Theybelieve fewer Calories slow down a mechanism in cells called the ribosome (核糖体),at least in mice. The mechanism is responsible for making vital proteins in cells,but with fewer calories it slows down, giving it more time to repair itself, The ribosome is complex like a car, and itneeds to replace the parts that wearout the fastest from time to time, according to John Price, a biochemistry professor at Brigham Young University.“When tires wear out, you don't throw the whole car away and buy new ones. It's easier to replace the tires," Price told VOA. But this doesn't mean that people who want to look younger should start skipping meals, especially given the study's early stage. Proper nutrition is important, Price explained. “Food isn't just material to be burned -it's a signal that tells our body and cells how to respond,"he told Science Daily.
The purpose of the research was ().
A.test the influence of calorie restrictions on aging.
B.explain why people have to maintain a normal diet.
C.find the most efficient way to control calorie intake.
D.invent technology that keeps people young and healthy.
Which of the following statements is TRUE about the experiment ()?
A.The biological age of people in the control group increased more than those in the restriction group.
B.Some participants were asked to double the amount of food they ate.
C.Flies and mice were used to compare the results of the human test with.
D.AlI the participants were of the same biological age at the start.
According to John Price, ().
A.a higher level of calorie intake meansmore healthy proteins.
B.reducing calorie intake could allow the ribosome to repair itself better.
C.the fewer calories one takes in, the better the ribosome works.
D.the ribosome is an important cell that controls the aging process.
第5题
A person's earnings seemed to have a major effect ______ the services received.
A、with
B、by
C、for
D、on
第6题
One of the main benefits of community service is that it()a person's character.
A. sets
B. builds
C. makes
第7题
A.Gathering non-relevant materials.
B.Stealing another person's ideas.
C.Sharing note with someone else.
D.Handing in assignments late.
第10题
We object __________ punishing a whole group for one person's fault.
A、on
B、about
C、for
D、to
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