Warm water freezes more quickly than cold water. Sir Francis Bacon said that alm

题型：不详难度：来源：

Warm water freezes more quickly than cold water. Sir Francis Bacon said that almost four hundred years ago. But few people believed him. Later, a Canadian scientist George Kell proved the English scholar was right. Dr.Kell filled an open jar（罐子）with cold water. He filled another with warm water. He put them both in the same low temperature. And the warm water froze first.
What was the reason? Some of the warm water changed into vapour. It went into the air. This meant that less of the warm water was left to freeze. And so the warm water froze faster than the cold water.
小题1: Sir Francis Bacon was__________________.

A．an American chemist	B．an English scholar
C．a Canadian scientist	D．a French physicist

小题2: Dr.Kell’s jars were both_____________________.

A．put in a place of the same low temperature

B．filled with warm water

C．left empty

D．put on a long table

小题3: The cold water froze more slowly because_____________.

A．there was less of it left	B．there was more of it left
C．something else was added to it	D．its jar was much bigger

小题4: Dr.Kell proved what Bacon said in _____________ way.

A．a difficult

B．a hard

C．a wrong

D．a simple

答案

BABD

解析

略

举一反三

阅读下面短文，从短文后所给各题的A、B、C、D四个选项中选出能填入相应空白处的最佳选项。
On August 26, 1999, New York City was struck by a terrible rainstorm. The rain caused the streets to   16  and the subway system almost came to a stop.
Unfortunately, this happened during the morning   17  hour. Many people who were going to work were   18  to go home. Some battled to   19  a taxi or to get on a bus. Still others   20  the storm bravely, walking miles to get to work.
I happened to be one of the people on the way to work that morning. I went from s

ubway line to subway line only to find that most 21 had stopped. After making my way through crowds of people, I finally found a subway line that was 22 . Unfortunately, there were so many people waiting to 23 the subway that I could not even get down the stairs to the 24 . So I took the train going in the 25 direction, and then switched back to the downtown train. Finally, after what seemed like forever, the train 26 my stop. Then I had to walk several blocks in the increasingly heavy rain. When I finally got to my office, I was 27 through, exhausted and discouraged.
My co-workers and I spent most of the day drying off. When it was 5:00 pm，I was ready to go home. I was about to 28 off my computer when I

received an email from Garth, my Director:
I would like to thank all of you who made the 29 and eventually reported to work. It is always reassuring (令人欣慰的), at times like these, when employees so clearly show their attention and devotion to their 30 . Thank you.
小题1:.

A．break

B．flood

C．sink

D．crash

小题2:.

A．rush

B．work

C．business

D．office

小题3:.

A．forced

B．refused

C．invited

D．gathered

小题4:.

A．order

B．pay

C．call

D．search

小题5:.

A．showed

B．fought

C．broke

D．faced

小题6:.

A．practice

B．routine

C．process

D．service

小题7:.

A．operating

B．acting

C．turning

D．rushing

小题8:.

A．check

B．get

C．board

D．find

小题9:.

A．street

B．ground

C．floor

D．platform

小题10:.

A．different

B．opposite

C．changed

D．right

小题11:.

A．paused

B．crossed

C．reached

D．parked

小题12:. A

. wet B. hungry C. angry D. cold
小题13:.

A．pay

B．get

C．turn

D．put

小题14:.

A．rule

B．effort

C．promise

D．model

小题15:..

A．computers

B．lives

C．actions

D．jobs

题型：不详难度：| 查看答案

People living in the country enjoy several advantages that people living in the city cannot enjoy.
They are in close contact (接触) with nature. They make friends with trees and stones. They breathe fresh air. They fight with strong winds. They listen to the song of birds.
This contact with nature is good for health. There are many diseases that are common in the city, but are not to be found in the country, For example, near---sightedness is almost unknown to country people.
Because of the absence of cars, one can walk more freely in the country than in the city, There are no rules of the road nor traffic signs to obey.
People living in the country can easily get fresh vegetables, fresh fruit and fresh milk, and they get them at lower prices than in the city.
Country life is economical (节俭的) in other ways, too. There are practically no temptations to waste money.
Country people are mostly honest. They say what they mean, and make and keep promises with sincerity (诚意). They do not put on air (摆架子). They do not pretend to have those ridiculous (荒谬的) manners which are necessary in what we call polite society.
小题1: What can’t country people often enjoy?

A．Musical concerts.	B．Fresh air.
C．Song of birds.	D．Close contact with nature.

小题2:What is probably more expensive in the country than in the city?

A．Vegetables.

B．Beer.

C．Milk.

D．Fruit.

小题3: What is NOT true of country life?

A．The traffic accident rate is very high in the country.

B．Living in the country saves one a lot of money.

C．Country people enjoy better health than the city people.

D．Country people are honest.

题型：不详难度：| 查看答案

The United States is one of the few countries in the world that has an official day on which fathers are honored by their children．On the third Sunday in June, fathers all across the United States are given presents, treated to dinner or otherwise made to feel special．
However, the idea for creating a day for children to honor their fathers began in Spokane, Washington．A woman by the name of Sonora Smart Dodd thought of the idea for Father’s Day while listening to a Mother’s Day sermon in 1909．Having been raised by her father, Henry Jackson Smart, after her mother died, Sonora wanted her father to know how special he was to her．It was her father that made all the parental sacrifices（牺牲） and was, in the eyes of his daughter, a selfless and loving man．Sonora’s father was born in June, so she chose to hold the first Father’s Day celebration in Spikane, Washington on the 19th of June, 1910．
In 1924 President Calvin Coolidge declared the third Sunday in June as Father’s Day．Roses are the Father’s Day flowers: red to be worn for a living father and white if the father has died．
When children can’t visit their fathers or take them out to dinner, they send a greeting card．Traditionally, fathers prefer greeting cards that are not too sentimental（伤感的）．Most greeting cards are too special so fathers laugh when they open them．Some give heartfelt thanks for being there whenever the child need Dad．
小题1:．The United States is special in Father’s Day because ______．

A．many people celebrate the day	B．only America celebrates the day
C．America makes it an official day	D．all men are honored in America

小题2:．At first, Father’s Day was fixed on June 19th because ______．

A．Sonora honored her father on her father’s birthday

B．Sonora’s birthday was June 19

C．it was decided by the president at that time

D．her mother died on June 19

小题3:．How many years has passed before Father’s Day became an official day since the father’s day was celebrated?

A．4

B．10

C．14

D．24

小题4:．According to the passage, on Father’s Day, ______．

A．people will wear the same flowers to honor their fathers

B．only daughters wear red flowers to honor their fathers

C．children must go home to honor their fathers

D．fathers are often honored in different ways

小题5:．According to the passage, we can infer that Henry Jackson Smart ______．

A．was very kind to anyone	B．was the first father honored in 1924
C．did a lot for his daughter	D．always help others by giving money

题型：不详难度：| 查看答案

Mother’s Day is usually celebrated on the second Sunday of May every year. Do you know that a mom deserves a special gift this year for Mother’s Day? Sure, flowers can always brighten Mother’s Day and a dinner out is al

way

s appreciated. However, doesn’t she deserve something more personal or something that lasts longer than an evening?
I’m talking about the gift of fitness. Improved fitness is a gift that is invaluable to everyone. When you give a woman the gift of fitness, you are helping her open her door to better health. I can’t think of a more thoughtful gift that shows the recipient （接受者）how much you care about their well-being. By giving the gift of fitness you are providi

ng them with unlimited health benefits. Besides, it’s a gift that you can truly feel proud to give.
Of course, we all know that exercising can help people stay slim and fit. But, do you also know about all the other great benefits of exercising? Daily physical activities reduce stress and help you sleep better. Fitn

ess has been linked to reducing the risk of some diseases and to warding off depression. Researchers also believe that strength training can help prevent osteoporosis （骨质疏松）. Not to mention that exercising also improves self-esteem, increases energy and helps you be able to do continuous work for longer.
All moms would find these benefits extremely great. If they are like mo

st of us, they have probably even mentioned how they would like to drop a few pounds or just get in better shape. In fact, experts say that about 62% of Americans are currently on a diet. By giving the gift of fitness, you are helping provide your mom with extra motivation. She may be more motivated to actually get fit because she doesn’t want to feel guilty about ignoring such a thoughtful gift.
小题1: The first paragraph is likely to tell us that ________.

A．we should give a special gift to our mom for Mother’s Day

B．we should invite our mom to a dinner for Mother’s Day

C．it’s good to send flowers to moms for Mother’s Day

D．moms aren’t worth special gifts for Mother’s Day

小题2: The underlined word “invaluable”（in paragraph 2） means ________.

A．priceless

B．worthless

C．useless

D．helpless

小题3: According to this passage, the gift of fitness will ________.

A．make moms feel prouder

B．let moms free from illnesses

C．keep moms having a healthy diet

D．encourage moms to do more exercise

小题4: Which of the following would be the best title for this passage?

A．Better Pay Attention to Your Mother’s Health

B．Give the Gift of Fitness This Mother’s Day

C．Moms Like to Accept the Gift of Fitness

D．Help Your Mother Keep a Good Shape

题型：不详难度：| 查看答案

Culture helps human societies survive in changing natural environment．For example, the end of the last Ice Age, beginning about 15,000 years ago, brought a big challenge to which humans had to adapt．Before this time, large parts of the northern hemisphere were covered in great sheets of ice that contained much of the earth" s water．In North America, large animals that wandered the vast tundra （冰原） provided people with food and materials for clothing and simple shelters．When the earth became warm, large Ice Age animals disappeared, and many land areas were covered by rising sea levels from melting ice．But people survived, they developed new technologies and learned how to survive on new plant and animal species． Finally some people settled into permanent villages, durable houses and farms．
Cultural adaptation has made humans one of the most successful species on the planet． Through history, major developments in technology, medicine, and nutrition have allowed people to reproduce and survive in ever-increasing numbers．The global population has risen from 8 million during the Ice Age to about 6 billion today．
However, the successes of culture adaptation can also create problems in the long run．Over the last 200 years, people have begun to use large quantities of natural resources and energy and to produce a great amount of material and chemical wastes．The global population now consumes some important natural resources—such as petroleum, wood, and minerals—faster than nature can produce them．Many scientists believe that in the process of burning fuels and producing wastes, people may be changing the global climate in unpredictable and possibly harmful ways．Thus, the adaptive success of the present-day global culture of production and trade may be temporary．
小题1:What is the first paragraph mainly talking about?

A．How the human beings survived in the Ice Age．

B．What the situation was like during the Ice Age．

C．What caused the Ice Age to come to an end．

D．Why the Ice Age was very important．

小题2:To deal with the problems, human beings should ______according to the passage．

A．stop developing any longer

B．reduce the overuse of natural resources

C．stop the global warming and using natural resources

D．save more animals in case they all die out

小题3:Which of the following is the problem caused by cultural adaptation according to the passage?

A．A very developed culture came into being．

B．New technologies have been developed．

C．Natural resources have been used up．

D．Human activities have done damage to the balance of nature．

小题4:Which of the following can be the best tide of the passage?

A．Natural Environment Should Be Protected．

B．The Success of Cultural Adaptation Is Not Permanent．

C．The Global Population Is Increasing Since Ice Age．

D．Human Beings Are Capable of Surviving on Earth.

题型：不详难度：| 查看答案