题目
题型：山东省期中题难度：来源：
your traits. Traits are characteristics you inherit from your parents; this means your parents pass some of their
characteristics on to you through genes. For example, if both of your parents have green eyes, you might inherit
the trait of green eyes from them. Or if your mom has freckles, you might inherit that trait and wind up with a
freckled face. And genes aren"t just in humans - all animals and plants have genes, too.
Genes hang out all lined up on thread-like things called chromosomes. Chromosomes come in pairs, and there
are hundreds, sometimes thousands of genes in one chromosome. The chromosomes and genes are made of
DNA, which is short for deoxyribonucleic acid.
Chromosomes are found inside cells, the very small units that make up all living things. A cell is so tiny that
you can only see it through the lens of a strong microscope, and there are billions of cells in your body. Most
cells have one nucleus. The nucleus, which is sort of egg-shaped, is like the brain of the cell. It tells every part
of the cell what to do. How does the nucleus know so much? It contains our chromosomes and genes. Tiny as
it is, the nucleus has more information in it than the biggest dictionary you"ve ever seen.
B. How Do Genes Work?
C. What Does A Gene Consist of?
D. How Do Nucleus Command Cells?
B. send
C. obtain
D. pass
B. All living things receive traits from the old generations.
C. One"s green eyes might be passed on from the parents.
D. A mother"s freckled face might affect her young"s face.
B. genes exist inside cells that make up all living things
C. genes tells every part of the cell what to do
D. Chromosomes come in pairs containing genes.
B. not all living things are made up of cells
C. genes aren"t in humans but in animals and plants
D. DNA is made of chromosomes and genes
答案
核心考点
试题【阅读理解。 Each cell in the human body contains about 25,000 to 35,000 genes, whi】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
adolescents feel on top of the world, a new study reported.
[2]A lack of sleep among youngsters may trigger depression and suicidal thoughts, according to the
study by the Columbia University Medical Center.
[3]"Our results are consistent with the theory that inadequate sleep is a risk factor for depression, working
with other risk and protective factors through multiple possible causal ways to the development of this mood
disorder," said lead author James Gangwisch.
[4]"Adequate quality sleep could therefore be a preventative measure against depression and a treatment
for depression," he added in the study published in the Friday issue of Sleep magazine.
[5]The study followed the nightly habits of some 15,659 college and high-school students, and found those
who consistently turned in after midnight had a 24 percent higher risk of depression than those who _______
before 10:00 pm. Night owls also ran a 20 percent higher risk of battling suicidal thoughts, the study added.
[6]The American Academy of Sleep Medicine recommends that adolescents should sleep at least nine hours
or more a night. Those who were tucked in before 10:00 pm reported they slept on average about eight hours
and 10 minutes. But that amount of sleep dropped significantly for those in bed after midnight.
[7]And adolescents who slept five hours or less a night were 71 percent more likely to suffer depression
and 48 percent more at risk of becoming suicidal, the study said.
[8]"It is a common perception and societal expectation that adolescents do not need as much sleep as pre-
adolescents. Yet studies suggest that adolescents may actually require more sleep." said Gangwisch.
[9]"Studies have found that adolescents do not go to bed early enough to make up for earlier school start
time. And transitions to earlier school start times have been shown to be associated with significant sleep
deprivation."
_____________________________________________________________________________________
2. What theory are the study results similar to? (Please answer within 20 words)
_____________________________________________________________________________________
3. Fill in the blank in Paragraph 5 with proper words. (Please answer within 6 words)
_____________________________________________________________________________________
4. Which sentence in the text is the closest in meaning to the following one? It"s widely accepted that the
youngsters needn"t sleep as much as the child.
_____________________________________________________________________________________
5. Translate the underlined sentence in Paragraph 9 into Chinese.
_____________________________________________________________________________________
make your child feel angry, hurt, or misunderstood by what you say without realizing it yourself. It is important
to give your child the space he needs to grow while gently letting him know that you you"ll still be there for
him when he needs you.
Expect a lot from your child, just not everything. Except for health and safety problems, such as drug use
or careless driving; consider everything else open to discussion. If your child is unwilling to discuss something,
don"t insist he tell you what"s on his mind. The more you insist, the more likely that he"ll clam up. Instead, let
him attempt to solve (解决) things by himself. At the same time, remind him that you"re always there for him
should he seek advice or help. Show respect for your teenager"s privacy (隐私). Never read him his mail or
listen in on personal conversions.
Teach your teenager that the family phone is for the whole family. If your child talks on the family"s
telephone for too long, tell him he can talk for15 minutes, but then he must stay off the phone for at least an
equal period of time. This not only frees up the line so that other family members can make and receive calls,
but teaches your teenager moderation (节制). Or if you are open to the idea, allow your teenager his own
phone that he pays for with his own pocket money or a part-time job
B. how to respect a teenager
C. how to understand a teenager
D. how to help a teenager grow up
B. show respect
C. refuse to talk
D. seek help
B. to pay for his own telephone
C. to share the phone quickly
D. to answer the phone quickly
B. Give him advice only when necessary
C. Let him have his own telephone
D. Not talk about personal things with him
some form of postal service, the history of which goes back a long way. Indeed, the Egyptians began
sending letters from about 2000 BC, as did the Chinese a thousand years later.
Of course, modern postal service now are march more developed and faster. depending as they do on
cars and planes fore delivery. Yet they are still too slow for some people to send urgent documents (紧急
文件) and letters.
The invention of the fax (传真) machine increased the speed of delivering documents even more. When
you send a fax you are sending a copy of a piece of correspondence to someone by telephone service. It
was not until the early 1980s that such a service was developed enough for businesses to be able to fax
documents to each other.
The fax service is still very much in use when copies of documents require to be sent, but, as a way of
fast correspondence, it has been largely taken the place of by email. Email is used to describe messages sent
form one computer user to another.
There are advantages and disadvantages with emails. If you send some one an email,then he will receive
it extremely quickly. Normal postal services are rather slow as far as speed of delivery is concerned.
However, if you write something by email, which you might later regret, and send it immediately, there
is no chance for second thoughts. At least, if you are have to address and seal (封) the envelope and take it
to the post box. There is plenty of time to change your mind. The message is think before you email!
B. email is less popular than the fax service
C. the postal service has over the years become faster
D. the fax service has a history as long as the postal service does
C. the fax service had been fully developed by the 1980s
B. letters have been used in China for about 1,000 years
D. letters have been used in Egypt for about 2,000 years
B. you may regret if you don"t seal your envelope
C. you may regret before you send something by email
D. you need plenty of time to send an email
B. the advantage of fax machines
C. the advantage of emails
D. the progress in correspondence
An earthquake is caused by rocks moving underground. The surface of the earth is made up of about 20
huge plates. The plates are thousands of miles wide and many miles thick. Like turtles with their shells, they
carry oceans and continents right on their backs.
All the earth"s plates are constantly in motion, although they move very slowly, maybe an inch a year. They
push each other, trying to slip under or over each other, or to slide past one another. Earthquakes often happen
when two plates come together. Along the plates where the plates meet, there is a kind of crack in the earth"s
surface called a fault. The most famous fault in the United States is the San Andreas Fault, which runs 600 miles
through California and is more than 30 million years old.
An earthquake happens along a fault where two plates rub together while moving in different directions. The
earth shakes and shivers and vibrates like a rubber band that"s been snapped. Those vibrations are picked up by
an instrument which enables experts to figure out where the earthquake occurs and how strong it is. Scientists
measure an earthquake"s strength by what they have named the Richter Scale. The Scale runs from zero to nine,
with nine being the most powerful. Sometimes an earthquake occurs so far below the surface, we can hardly
feel it on top. Sometimes an earthquake is so strong that it has more power than a nuclear explosion. An
earthquake can last five seconds or up to ten minutes and create enough heat to melt any rock.
(Help: 1. plate n.板块 2. turtle n.海龟 3. shell n.壳 4. constantly adv.不断地 5. occur v.发生
6. rub v. 摩擦 7. vibrate v. 振动 8. figure out计算出 9. measure v. 测量 10. melt v. 熔化)
( )1. An earthquake is caused by rocks moving underground.
( )2. All the earth"s plates are constantly in motion, and they move very fast.
( )3. The most famous fault in the United States is the San Andreas Fault, which runs 600 miles through
California.
( )4. The Scale runs from zero to nine, with zero being the most powerful.
根据文章内容，回答下列问题。
5. When can an earthquake occur according to the passage?
____________________________________________________________________________
6. How strong can an earthquake sometimes be?
____________________________________________________________________________
7. What is your feeling if an earthquake occurs far below the surface of the earth?
____________________________________________________________________________
earthquake. there is often a great noise first. Then the earth 2 terribly; many houses fall down. Railway
tracks break and trains go 3 lines; a great many factories are 4 ; thousands of deaths are caused, and
many more lose homes... 5 the great damage and deaths caused by the earthquake itself, other disasters
such as fires often 6 . More buildings are destroyed and more 7 are caused.
It is well known of the 8 of a possible earthquake, and for centuries man has been making researches
on earthquakes. More than 2,000 years ago, 9 , a Chinese scientist named Zhang Heng invented a machine
which could find out from which 10 the seismic (地震的) waves had come, and this machine is still 11
by scientists today. Now we know much more about earthquakes and 12 they happen, but we still cannot
tell exactly when and where an earthquake will happen, and cannot 13 it from happening. So earthquakes
are among the 14 disasters in the world.
No one can stop natural earthquakes. 15 , scientists can help stop earthquakes destroying whole cities
and causing too many deaths.