题目
题型：模拟题难度：来源：
"physiological (生理的) age".
Researchers studying genes believe they can now tell exact physiological age by looking at a
number of clues in DNA. They don"t have to ask people how they feel or look at their appearance.
The breakthrough could solve the mystery of why some 70-year-olds function at the level of those
in their 50s, while others become weak sooner than you would think.
The researchers made the breakthrough by finding the "biomarkers" of aging in tiny worms.
The worms they studied had an average lifespan (寿命) of three weeks. Like humans, some remain
lively much longer than other similarly-aged worms, while others show signs of premature aging.
By genetically profiling (基因识别) 104 different worms at various ages, the researchers found a
group of genes that are involved in the aging process.
"This is a first step; our results were not perfect, but we were able to predict the ages of the animals
70 percent of the time, which is far better than anything that has been done before," said Simon Melov,
the lead researcher at Buck Institute for Age Research in California.
Now they want to extend their studies to mice and eventually humans.
"I am confident that at some point there will be a non-subjective method of determining how old
someone is with a high level of confidence," said Melov.
The speed at which people age depends on a number of things including genetic inheritance (遗传),
lifestyle and mental health.
Determining chronological (按时间顺序的) age in both worms and humans is easy - count forward
from birth. But determining physiological age has remained subjective ? based on how someone looks
or functions.
The findings have major implications for age research in humans. Examining biomarkers over time
would provide a scientific basis for anti-aging medicines. The technology would also provide a means
of determining whether a person is aging faster or slower than people would normally think.
1. How can researchers tell one"s exact physiological age?
A. By looking at their appearance.
B. By asking people how they feel.
C. By looking at a number of clues in DNA.
D. By finding the "biomarkers" of aging in tiny worms.
2. What did the researchers base their survey on as their first breakthrough?
A. Humans.
B. Worms.
C. Mice.
D. Lifespan.
3. The researchers found__________.
A. some 70-year-olds function become weak sooner than expected.
B. anyone was as old as he was feeling.
C. a group of genes were involved in the aging process.
D. the speed at which people age only depends on their genetic inheritance.
4. What is the best title of the passage?
A. Genetically profiling
B. Find your true age
C. Worms and humans
D. Research in humans
答案
核心考点
试题【阅读理解 You are only as old as you feel, it is said. But soon scientists will b】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
When American inventor Alexander Graham Bell invented the telephone in 1876, it was a revolution
in communication. For the first time, people could talk to each other over great distances. Over the last
two decades a new means of spoken communication has appeared: the mobile phone.
The mobile phone is like a two-way radio. But the two-way radio is a limited means of
communication. As soon as the users move out of range of each other"s broadcast area, the signal is lost
. In the 1940s, researchers experimented with the idea of using a number of radio masts (无线电杆) to
pick up signals from two-way radios. A caller would always be within range of one of the masts. When
he or she moved too far away from one mast, the next mast would pick up the signal. (Scientists referred
to each mast"s reception area as being a "cell". This is why in many countries mobile phones are called
"cellphones".)
However, 1940s" technology was just at the beginning. The "mobile phones" were huge boxes. They
had to be moved by car.
The first real mobile telephone call was made in 1973 by Dr Martin Cooper. As soon as his invention
was complete, he tested it by calling a rival (竞争对手) scientist to announce his success. Within a
decade, mobile phones became available to the public.
They have changed the way we do a lot of things. One powerful feature is: the short message service
(SMS) or text message. It"s the perfect communication method for the busy modern lifestyle. The text
message has changed the way we write in English. The language construction became more lax (松散
的). Traditional rules of grammar and spelling are much less important.
Over the last few years mobiles have become more and more advanced. We have seen the
introduction of cameras, global positioning system and Internet access.
Alexander Graham Bell would be surprised if he could see how far the science of the telephone has
developed in less than 150 years. If he were around today, he might say: """That"s gr8! But I"m v busy
rite now. Will call U 2nite."
1. The article is intended to_______.
A. warn people of the possible risks in using mobile phones
B. predict the applications of mobile phones
C. convince people of the uses of mobile phones
D. inform readers of the history and benefits of mobile phones
2. What"s the CORRECT time order about the development of communication?
a. the telephone invented by Alexander Graham Bell
b. "mobile phones" with very large boxes
c. mobile telephone call made by Dr Martin Cooper
d. mobiles with cameras, GPS and Internet access
A. a, c, b, d
B. b, a,, c, d
C. a, b, c, d
D. a, c, d, b
3.The last sentence of the whole passage ""That"s gr8! But I"m v busy rite now. Will call U 2nite."
May probably means________.
A. It"s eight now. I"m very busy. (I) Will call you tonight
B. That"s great! But I"m very busy right now. (I) Will call you tonight
C. That"s great! But I"m busy writing now. (I) Will call you at two tonight
D. "8" is great! But I"m very busy right now. (I) Will call it "U" to night
4.What do you think of the author according to the last paragraph?
A. Worried.
B. Ironic.
C. Kind.
D. Humorous.
Being organized is an important skill for school and life. When you"re well organized, you can stay
focused, instead of spending time hunting things down. 1 For schoolwork, it means having one
notebook or place where you store all your assignments, so you know what you have to do and when.
Keeping labeled folders(贴有标签的文件夹) for handouts(课堂讲义)and keeping all your
schoolwork neat and in a specific place-these are the main parts of organization.
For home stuff, being organized means having a place to put your things and putting them back as you
go. 2 It means keeping your schoolbag, your shoes, and your clean underwear in the same places so
you always know where to find them.
Planning is part of being organized, too. 3 Calendars, lists, and schedules can help you plan. You
can buy or draw a calendar and keep it near your workplace. Making a schedule or "to-do" list for
yourself is a good idea. Looking at your list helps you keep track of what you need to do. 4 Check
off things when you"ve done them. Use your list to help you decide which thing is most important to
work on first.
5 But once you"re organized, it feels great. The less time you spend hunting around for things or
panicking about homework, the more time you have for better things, like reading a good book or
playing.
A. Add new things as you get assignments.
B. First, you should get your schoolwork organized.
C. It means hanging your coat up instead of dropping it on the floor or throwing it on a chair
D. It takes some extra efforts to organize yourself and your stuff.
E. Planning means deciding what you will do and when you will do it.
F. You will benefit a lot from a good habit.
G. What does it mean to be organized?
classroom stress and parental pressure, according to a study published on Tuesday.
The problem is so bad that urgent measures are needed, warns the study, led by British and Chinese
researchers.
The investigation surveyed 2,191 pupils aged nine to 12 in nine schools in urban and rural Zhejiang,
a relatively prosperous coastal province in eastern China.
Eighty-one percent of the youngsters said they worried "a lot" about exams, 63 percent feared being
punished by their teacher, 44 percent had been physically bullied at least sometimes - with boys likelier
to be victims than girls - and 73 percent had been physically punished by their parents.
Most of the children complained they struggled to cope with the amount of homework they were
assigned.
Over one-third reported headaches or abdominal pains - psychosomatic symptoms of stress - at least
once a week. The most stressed children reported incidence of aches or pains of four times a week.
The investigation, led by Therese Hesketh, a professor at University College London (UCL) Centre
for International Health and Development, pointed the finger at extreme competitiveness in China"s
education system, from the onset of primary school.
"The competitive and punitive educational environment leads to high levels of stress and
psychosomatic symptoms," the authors say.
"Measures to reduce unnecessary stress on children in schools should be introduced urgently."
The paper appears in Archives of Disease in Childhood, a peer-reviewed journal of the British
Medical Association (BMA).
The "urban" setting for the study was Hangzhou, the provincial capital of Zhejiang, while the "rural"
setting was a poor county in Quzhou prefecture, in the west of the province.
The study highlights some of the complexities that, it says, explain the demands for academic
excellence and intolerance of failure.
One factor is the country"s dramatic rise in prosperity, which has created "previously unheard-off
possibilities for upward mobility" and in turn stoked pressures on children to do well at school.
Other reasons are China"s one-child policy and the Confucian traditions of respect for parents and
elders, filial piety, obedience and discipline.
"The aspirations of many parents, who had limited educational opportunities themselves are now
invested in their only children," it says.
Previous studies on school-related stress and its impact on health are few and generally come from
Scandinavia.
A 2008 assessment among 10- to 13-year-old in Sweden found that 21 percent of boys of 30
percent of girls experienced headache, and 17 percent of boys and 28 percent of girls experienced
abdominal pain at least once per week.
1. What mainly caused schoolchildren to suffer from psychological ill-health?
A. Competitiveness in education system
B. Classroom stress and parental pressure
C. Physical punishment from their parents
D. Endless homework from school teachers
2. The underlined part "cope with" in Para.5 most probably means ______.
A. to fit in
B. to adapt to
C. to deal with
D. to get along with
3. From Paragraph 4, we know what the schoolchildren worry most is _______.
A. bullying behavior at school
B. many examinations at school
C. physical punishment by parents
D. physical punishment by teachers
4. What can we infer from the passage?
A. More and more schoolchildren will drop out of school soon
B. Homework and examinations will be cancelled at all schools
C. Parents and teachers will give up educating the schoolchildren
D. Too much stress does great harm to schoolchildren physically and mentally
5. What is the main idea of the passage?
A. Children in China sickened by school pressure
B. Measures to reduce unnecessary stress on children
C. The investigation, led by University College London
D. Extreme competitiveness in China"s education system
选出符合各段意思的小标题，并在答题纸上将相应选项的标号涂黑。选项中有一项是多余
选项。
| A.What is the field trip fee at the Marine Science Center? B.What should we prepare for the visit? C.Where do the students get dropped off? D.Why should I bring my class to the Marine Science Center? E.How many students can the Marine Science Center accommodate? F.When else is the bus needed during the school field trips? |
| 阅读理解 |
| Weather changes when the temperature and the amount of water in the atmosphere change. We can see and feel water coming from the atmosphere when we have rain. But the water must somehow get back to the atmosphere. Meteorologists call this the water cycle. There are many stages in the water cycle. Rain falls when water vapour in clouds condenses(冷却成 液体). Drops of water form and fall to the ground. The water soaks into the ground and feeds streams and rivers. A lot of rain falls into the sea. The heat of the sun evaporates some of the water in the ground and in the rivers, lakes and the sea. It changes the liquid water into water vapour. The vapour rises onto the air. Water vapour is normally invisible. On a very damp or humid day, however, you can sometimes see water vapour rising from a puddle or pond in a mist above the water. Water vapour also gets into the air from living things. Trees and other plants take in water through their roots and give off water vapour from their leaves. People and land animals drink water and breathe out water vapour. In all these ways the water returns to the air. There it gathers to form clouds and condenses to form rain. The rain falls to earth, and the cycle starts again. It contains even if snow or hail fall instead because both eventually melt and form water. The amount of water vapour is more in the air tropics than in the cold polar regions. 1. What is the main idea of the passage? A. Water cycle. B. Water vapour. C. How rain forms. D. Water, vapour, rain. 2. How many ways of the water returning to the air are discussed in the text? A. Three B. Four C. Five D. Six 3. Whether water vapour can be seen or not depends on_____. A. how much water is evaporated B. how good your eyes are C. in which way water is evaporated D. climate or weather 4. From the passage, we get to know_____. A. there is more water vapour in the air tropics than in cold polar regions B. there is more water vapour in the air in cold polar region than in the tropics C. it gets more rain in the tropics than in cold polar regions because there is less vapor D. the amount of water vapour in the air depends on how often it rains |