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DNA is a substance that makes up genes．Everything alive has genes. Plants have genes. Animals have genes. You have genes. Genes are the basic units of heredity. Heredity means all the characteristics you inherit from your parents. You get your genes from your parents. You inherit half of your genes from your mother． You inherit half of your genes from your father． Genes are a kind of code． A tree’s genes tell what shape its leaves will be． A cat’s genes tell what color its fur will be． Your genes tell what color your eyes will be．Your genes tell what color your hair will be．Everything about you comes from the code in your genes．Genes line up on strands called chromosomes in cells．Everything alive is made up of cells．Chromosomes are in the center, or nucleus, of cells．
An Austrian monk named Gregor Mendel first saw inherited patterns in pea plants．He experimented with pea plants in the 1860s．One of the things, or traits, Mendel studied was what makes some pea plants tall and some short． He said that the traits （特征） must come from units of heredity （遗传）passed from the parent plants．These units were called genes．
In the mid-1900s, scientists discovered that genes are made of DNA． In the 1970s, scientists learned how to change DNA with genetic engineering．Scientists also learned that problems with certain genes cause diseases．Muscular dystrophy, cystic fibrosis, and hemophilia are some genetic diseases—diseases caused by problems in genes． Today, scientists are looking for ways to cure genetic diseases by altering genes through a process called gene therapy．
1． If one's father has blue eyes, while his mother has grey ones, _________．
A． their son will have blue eyes．
B． Their son is sure to have grey eyes．
C． their son's eyes will share both that of father's and mother's．
D． It is probable that their son will have either blue eyes or grey ones．
2． Which is the correct from large to small?
A． genes---chromosomes---cells B． cells---chromosomes---genes
C． chromosomes---cells---genes D． cells---genes---chromosomes
3． In the second paragraph, the author tells us ___________．
A． Gregor Mendel discovered genes
B． Gregor Mendel was an expert in plants
C． Gregor Mendel did a lot of experiments with pea plants
D． Something that happened to an Austrian monk
4． In the last sentence, the word "altering" can best be replaced by __________．
A． changing B． preserving C． deserving D． digesting
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| A. understand B. environmentally C. gamble D. involve E. necessary F. potential G. shortcuts H. specific I. structurally J. surprises |
The home inspection is an essential part of any home buying process. Without a home inspection, you can never be sure what you're getting and when buying a home that's a lot of money to __41__ on uncertainty. A home inspection ensures that there are no __42__ and that you can enjoy your future home for years to come.
A home inspection will __43__ hiring a company to send a home inspector out to go through your potential home with you and thoroughly inspect everything to make sure there are no major problems that might not be obvious to the average home owner. He will go over all the wiring, plumbing(管道系统), the roof and the foundation to make sure everything is __44__ sound. At the same time as the home inspection it's always a good idea to have a pest (昆虫) inspection to check for damaging insects such as carpenter ants.
Different states have different regulations for home inspections. So you need to be aware of what the requirements of your __45__ state are and make sure the inspector covers these areas. It’s a good idea to ask to see any __46__ certification, which a professional home inspector will gladly show you. It’s also best to make certain that your specific inspector has experience with your region. A local home inspector will better __47__ conditions in your area such as damp basements, winter damage to roofing or cracks in the foundation caused by normal settling.
A thorough home inspection takes time, so don’t settle for someone that you feel might be taking __48__. Many home inspectors are happy to have you accompany them on the inspection. A walk through with the home inspector is a great time to learn about how your home works and what to look for in terms of __49__ trouble.
A home inspection is just absolutely necessary and one will provide much peace of mind once you move into your new home.
查看习题详情和答案>>Alex Taw，a 21?year?old student from Wiltshire，England.He spent last summer like any other high school graduate—hanging out with friends，preparing for college，worrying about his university fees.While most of his peers gave up on their pipe dreams，he sat down with a notebook at home，and jotted down (草草记下) the question：How can I become a millionaire?
The result was the MillionDollarHomepage.com.Alex’s initial investment was 50 pounds to buy web space and a domain (领域) name.He divided the blank homepage into one million pixels (电脑上的像点)，10,000 blocks of 100 pixels each.Each pixel was worth $1 with minimum purchase 100 pixels.Within a month Alex had earned some $37,000，enough for him to cover the entire cost of his forthcoming three years at university.In just a few months，he became a real millionaire.
How did he come up with the idea of the Million Dollar Homepage?
“Well，I was trying to think of a way to make some money before I started university，as I was about to take on a huge debt and I was already overdrawn (透支)．Swift action was necessary！”He said.
He also added，“The important thing is that anything is possible—we are only limited by our imagination.I always had this belief that a good idea can be successful on its own.I think I’ve learnt that if we think deeper there are magical solutions hiding away for us to find.”
His personal philosophy around money is：Money is not everything，but it’s an essential part of the way we live.Having_some_removes_a_certain_amount_of_stress，but，unless_we_are_careful，it_can_create_a_new_type_of_stress.
He also said，“I still want to go to university.Aside from gaining knowledge about business，there are other reasons—exploring your interests，meeting new people，and being in a creative environment.”
Besides making contributions to society，he would try to encourage and inspire people to think of creative solutions to problems，whatever they are.
1.According to the passage，which of the following is NOT an important factor for being a millionaire?
A．Large imagination.? B．Quick action.
C．Great ambition.? D．Great investment.
2.Which of the following statements is TRUE?
A．Alex Taw is an American millionaire.
B．Alex Taw will graduate from university.
C．Alex Taw doesn’t work hard.
D．Alex Taw was not rich before.
3. What does the underlined sentence in Paragraph 6 mean?
A．The more money we have，the more stress we have.
B．Money can be of great help.
C．We should try our best to earn money.
D．Money is helpful in some way，but we should make full use of it.
4. What would be the best title for the passage?
A．Little Money Leads to Be a Millionaire
B．The Success Road to Be a Millionaire
C．Alex Taw：An Millionaire Boy
D．The MillionDollarHomepage.com
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Wang Yue has just come back from the
_______61. Wang Yue’s uncle is fond of reading story books. He reads all kinds of stories such as love stories, historical stories, detective stories, etc. However, there is no doubt that science fiction stories are his favorites.
_______62. Wang Yue’s mother works for a local newspaper. She used to write a column about love but now she is making a survey about how much foreigners know about Chinese people and culture. She has been collecting materials in
_______63. Wang Yue’s father is an history teacher who is very interested in the history of
_______64. Wang Yue’s cousin is a senior middle school student who is going to take the College Entrance Examination next year. But she is not good at English, especially English grammar. So she is looking for some books which are helpful.
_______65. Wang Yue’s little brother is studying in a Middle School. He as well as some other students is going to pay a visit to an American middle school and stay there for three weeks. He is a little worried because he knows nothing about American school life.
A. Into
This book introduces the identity and specific spy activities of Douglas Mackiernan, the first CIA agent（中情局探员）who was killed on duty by armed Tibetans. The author of the book based his description on detailed research based on the memories of former CIA agents and interviews with related eyewitnesses in
B. Practical English Usage（by Michael Swan）
This book is a practical reference guide to language points. It deals with over 600 points which regularly cause problems for foreign students of English. Most of the points treated are grammatical, but there are also explanations of a certain number of common vocabulary problems. Being a reference book, it contains information at various levels, ranging from relatively simple points to quite advanced problems.
C. Battlefield Earth（by L. Ron Hubbard）
An intelligent and creative masterwork of adventure in the far future, L. Ron Hubbard’s Battlefield Earth describes an Earth controlled for a thousand years by an alien invader ---and man is an endangered species. New York Times best-selling author L. Ron Hubbard has created a vast, unforgettable and exciting world in Battlefield Earth.
D. Xu Liang’s American Adventure（ by Mary Williams）
Xu Liang is an excellent Chinese student from
E. Chicken Soup for the Couple’s Soul（by Jack Canfield and Mark Victor Hansen）
This is a book for husbands and wives and lovers and anyone who dreams of finding their soul’s true mate（配偶）. Each story in this book was written by someone who has been transformed by love. Some stories will make you laugh. Some will make you cry. But above all, the stories in this book sing high praise for love’s ability to endure, beyond years, beyond difficulty, beyond distance, beyond even death.
F. Where’s the Duck in Peking?（ by Cliff Schimmels）
Whether you are a
as gifts. He brings back six books (A-F). After the description of each person, decide which book is the most
suitable one for the people and then mark the correct letter (A-F) on your answer sheet. There is one extra book,
which you do not need to use.
historical stories, detective stories, etc. However, there is no doubt that science fiction stories are his favorites.
_______ 2.Li Hua's mother works for a local newspaper. She used to write a column (专栏) about love but
now she is making a survey about how much foreigners know about Chinese people and culture.She has been
collecting materials in China and from abroad.
_______ 3.Li Hua's father is a history teacher who is very interested in the history of China, especially China's
modern history. What's more, he pays special attention to the development of China's minority areas.
_______4.Li Hua's cousin is a senior middle school student who is going to take the College Entrance
Examination next year. But she is not good at English, especially English grammar. So she is looking for some
books which are helpful.
_______5.Li Hua's little brother is studying in a Middle School. He as well as some other students is going to
pay a visit to an American middle school and stay there for three week He is a little worried because he knows
nothing about American school life.
the identity and specific spy activities of Douglas Mackiernan, the first CIA agent (中情局探员) who was killed
on duty by armed Tibetans. The author of the book based his description on detailed research based on the
memories of former CIA agents and interviews with related eyewitnesses in Tibet and India.
B. Practical English Usage (by Michael Swan) This book is a practical reference guide to language points. It
deals with over 600 points which regularly cause problems for foreign students of English. Most of the points
treated are grammatical, but there are also explanations of a certain number of common vocabulary problems.
Being a reference book, it contains information at various levels, ranging from relatively simple points to quite
advanced problems.
C. Battlefield Earth (by L. Ron Hubbard) An intelligent and creative masterwork of adventure in the far future,
L. Ron Hubbard's Battlefield Earth describes an Earth controlled for a thousand years by an alien invader-and
man is an endangered species. New York Times best-selling author L. Ron Hubbard has created a vast,
unforgettable and exciting world in Battlefield Earth.
D. Xu Ling's American Adventure ( by Mary Williams) Xu Ling is an excellent Chinese student from Hangzhou.
As his father goes to America for a one-year training, Xu Ling, as well as his mother goes with his father and
begins his new life in Eisenhower High School. The book consists of 21 chapters, each reflecting Xu Ling's
life in America in a different aspects. The book is written in the most fundamental words and is intended for
Chinese middle school students.
E. Chicken Soup for the Couple's Soul (by Jack Canfield and Mark Victor Hansen) This is a book for husbands
and wives and lovers and anyone who dreams of finding their soul's true mate (配偶). Each story in this book
was written by someone who has been transformed by love. Some stories will make you laugh. Some will make
you cry. But above all, the stories in this book sing high praise for love's ability to endure, beyond years, beyond
difficulty, beyond distance, beyond even death.
F. Where's the Duck in Peking? (by Cliff Schimmels) Whether you are a China expert or a novice, this book will
give you insight into the hearts and minds of the Chinese people. Cliff brings the reader to tears on one page and
belly laughter on the next. This profound look into China's everyday life is a must-read for anyone interested in
working in China or working with the Chinese people.