Each cell in the human body contains about 25,000 to 35,000 genes, which carry information that determines 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.
71. What is the best title of this passage?
A. What Is a Gene? B. How Do Genes Work?
C. What Does A Gene Consist of? D. How Do Nucleus Command Cells?
72. What does the underlined word “inherit” probably mean in the first paragraph?
A. carry B. send C. obtain D. pass
73. Which of the following is NOT true according to the passage?
A. The parents pass some characteristics on to their children.
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.
74. From the passage we can know that______________.
A. genes can decide all your characteristics from parents.
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.
75. From the passage we can conclude that ___________.
A. not all cells have one nucleus inside .
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.
Below is some advice on how to prevent cancer:
1. Eat Blueberries
Aside from being a healthy and delicious snack, blueberries contain pterostilbene, which has important colon（结肠） cancer-fighting prosperities. But wait, it gets better. Blueberries also offer a large dose of vitamins C (14 milligrams per cup). So at breakfast, try to take in a cup and a half of blueberries in your cereal or yogurt, or mixed with other berries.
2. Drink Pomegranate（石榴）Juice
The deep red juice of the pomegranate contains polyphenols, isoflavones and ellagic acid, which together create a powerful anticancer mixture. Most recently, researchers from the University of Wisconsin at Madison has discovered that 16 ounces of pomegranate juice per day also may inhibit the growth of lung cancer.
3. Relax
Feeling stressed or worried? Find ways to relax and you may reduce your chances of developing cancer. Purdue University researchers tracked 1,600 men over 12 years and found that half of those with high levels of worry died during the study period. Only 20 percent of the optimists died before the study were completed, while 34 percent of the extremely anxious men died of some type of cancer. Instead of stressing about the past or future, focus on the present and relax!
4. Take Selenium（硒）
Selenium is well known for its cancer-fighting properties. In a study of almost 1,000 men, researchers from the Journal of the National Cancer Institute found that when men with the lowest initial levels of selenium in their bodies received a daily supplement over a-4-year period, they remarkably cut their prostate（前列腺） cancer risk by 92 percent. However, it is possible to get too much of a good thing, so monitor your intake of selenium-containing supplements, Brazil nuts, tuna, meats and grains carefully.
5. Eat Sushi（寿司）
Seaweed may not be your idea of a great snack, but it is high in fiber, calcium and iron, and dry, roasted seaweed sheets used in sushi provide the additional benefits of vitamins A and C. Sushi rolls are also high in protein. So don’t skimp（节省）on the Sushi!
6. Breathe Clean Air
There’s no question that secondhand smoke kills. A recent American Journal of Public Health study showed that nonsmokers working in smoky places had three times the amount of carcinogen（致癌物质） in their urine（尿） than nonsmokers working in smoke-free locations. What’s worse, their levels of the carcinogen rose 6 percent for every hour worked. Nine states have banned smoking in all workplaces, bars and restaurants. The message is clear: Do whatever you can to avoid the cloud of smoke.
7. Break a Sweat
Even a small amount of exercise can offer major cancer-fighting benefits. In a study of 29,110 men published in The International Journal of Cancer, men who exercised just once a week had a percent lower risk of metastasis(转移性) prostate cancer than men who didn’t work out at all. The better the frequency, duration and intensity of the exercise, the bigger the reduction in risk, according to the study.To prevent yourself from catching colon cancer, you should eat ________ as often as possible.
| A．sushi | B．blueberries |
| C．pomegranates | D．Vitamin D |
A person is very likely to catch some type of cancer if _________________.
| A．he is very fond of exercise every day. |
| B．he is addicted to drinking |
| C．he is always feeling extremely stressed or worried |
| D．he likes to have meals in restaurants |
_____________________________ will remarkably reduce the risk of men’s prostate cancer.
| A．Having a proper supplement of selenium |
| B．Drinking a cup of pomegranate juice every day |
| C．Breathing fresh air now and then |
| D．Taking exercise at least once a week |
If you want to keep cancer away, it is completely important to ______.
| A．have a daily supplement of vitamins B and C |
| B．try to ignore the secondhand smoking |
| C．take in as many selenium-containing supplements as possible |
| D．have exercise as often as possible |
With only about 1, 000 pandas left in the world, China is desperately trying to clone(克隆) the animal and save the endangered species. That’s a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called “Noah’s Ark”.
Noah’s Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2, 000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem,” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer, who is one of the leaders of the Project at Texas A& M, the first-ever attempt at cloning a dog.
“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”The aim of “Noah’s Ark” project is to _______.
| A．make efforts to clone the endangered pandas |
| B．transfer the nuclear of one animal to another |
| C．collect DNA of endangered animals to study |
| D．save endangered animals from dying out |
According to Professor Kraemer, the major problem in cloning pandas would be the lack of _______.
| A．available panda eggs | B．host animals |
| C．qualified researchers | D．enough money |
The best title for the passage may be _______.
| A．China’s Success in Pandas Cloning |
| B．Exploring the Possibility to Clone Pandas |
| C．The First Cloned Panda in the World |
| D．China —the Native Place of Pandas Forever |
From the passage we know that _______.
| A．Kraemer and his team have succeeded in cloning a dog |
| B．scientists try to implant a panda’s egg into a rabbit |
| C．Kraemer will work with Chinese scientists in clone researches |
| D．about two thousand of species will probably die out in a century |
When I first told people I was going to work in Cameroon, the most common reaction was：“Why？” The second was：“It’s in Africa；you’ll die！” The third: “Where is that？”So let me give some answers. I was offered a job that looked interesting in a part of the world I’d never been to before. I’d also long had an interest in Africa, so I decided it was time to find out the reality. A small amount of research showed that in more than 40 years since gaining independence, Cameroon has been a peaceful country with no wars. Not only were there no wars but Cameroon is a food exporter to the region.
Now, after three years, I can say that these have been the healthiest years of my life! No malaria or any of the other frightening diseases you read about when Africa is mentioned .The worst thing that ever happened to me was a bout of food poisoning-once.
So what is it like to teach here? Well not surprisingly, not so different from anywhere else. Most students come to us with a bit of English in their heads. Cameroon is a bilingual country with French and English as official languages, while there are also close to 200 local ethnic languages in a country of 16 million people. French is the dominant language, spoken by about eighty percent of the population.
The local school system is very traditional and somewhat strict. Perhaps not surprisingly when there can be up to 150 students in the classroom ( of which maybe 30 have the books, and there are probably seats for 70)．Like anywhere, students appreciate it if you know a bit about their country, and not just Roger Milla (top scorer of the 1990 World Cup, in case you’re wondering). It helps if you know the names of the ten provinces, know who the first president was, or can say a word in a local language.
So in conclusion: Cameroon isn’t just football. Nor is it war, poverty and disease. It’s just life and people, like anywhere else.On hearing the writer’s decision, most people__________.
| A．admired him |
| B．considered it as a joke |
| C．didn’t understand him |
| D．laughed at him |
According to the passage, Cameroon is__________.
| A．peaceful after liberation |
| B．a country full of diseases |
| C．a poor country, especially lack of food |
| D．quite different from others in education |
What can we infer from the passage?
| A．Food export may lead to many frightening diseases. |
| B．Most students in Cameroon do not need books. |
| C．Cameroon is not as bad as people commonly believed. |
| D．There must be a lot of people suffering from food poisoning. |
Which language is spoken by about eighty percent of the population in Cameroon?
| A．local dialect | B．French |
| C．An ethnic language | D．English |
When her five daughters were young, Helene An always told them that there was strength in unity (团结). To show this, she held up one chopstick, representing one person. Then she easily broke it into two pieces. Next, she tied several chopsticks together, representing a family. She showed the girls it was hard to break the tied chopsticks. This lesson about family unity stayed with the daughters as they grew up.
Helene An and her family own a large restaurant business in California. However, when Helene and her husband Danny left their home in Vietnam in 1975, they didn't have much money. They moved their family to San Francisco. There they joined Danny's mother, Diana, who owned a small Italian sandwich shop. Soon afterwards, Helene and Diana changed the sandwich shop into a small Vietnamese restaurant. The five daughters helped in the restaurant when they were young. However, Helene did not want her daughters to always work in the family business because she thought it was too hard.
Eventually the girls all graduated from college and went away to work for themselves, but one by one, the daughters returned to work in the family business. They opened new restaurants in San Francisco and Los Angeles. Even though family members sometimes disagreed with each other, they worked together to make the business successful. Daughter Elisabeth explains, "Our mother taught us that to succeed we must have unity, and to have unity we must have peace. Without the strength of the family, there is no business."
Their expanding business became a large corporation in 1996, with three generations of Ans working together. Now the Ans' corporation makes more than $20 million each year. Although they began with a small restaurant, they had big dreams, and they worked together. Now they are a big success. Helene tied several chopsticks together to show ______.
| A．the strength of family unity |
| B．the difficulty of growing up |
| C．the advantage of chopsticks |
| D．the best way of giving a lesson |
We can I earn from Paragraph 2 that the An family ______.
| A．started a business in 1975 |
| B．left Vietnam without much money |
| C．bought a restaurant in San Francisco |
| D．opened a sandwich shop in Los Angeles |
What can we infer about the An daughters?
| A．They did not finish their college education. |
| B．They could not bear to work in the family business. |
| C．They were influenced by what Helene taught them. |
| D．They were troubled by disagreement among family members. |
Which of the following can be the best title for the passage?
| A．How to Run a Corporation |
| B．Strength Comes from Peace |
| C．How to Achieve a Big Dream |
| D．Family Unity Builds Success |
Welcome to the Electronic Village to explore new ways of language teaching and learning.
| Electronic Village Program (Thursday, June 18, 2015) |
|
| Nearpod ❖9:00 am to 10:00 am ❖Room 501 Nearpod is a software program that creates a rich context (语境) for students to learn vocabulary. The presenter will show how to use it. |
TEO ❖ 2:00 pm to 3:00 pm ❖Room 502 Our students come from different backgrounds but have the same desire to learn on-line. The presenter will use examples from his first on-line class to explain how any teacher can begin teaching on-line with TEO. |
| Kahoot ❖10:30 am to 11:30 am ❖ Room 601 Kahoot software can be used to create grammar tests which can be graded on a network. It can provide students with instant feedback (反馈), including reports about their strengths and weaknesses. |
Prezi ❖3:30 pm to 4:20 pm ❖Room 602 Uses of Prezi in listening and speaking courses draw students' attention to speaking more fluently. The presenter will show how students can use Prezi to confidently present on a variety of topics, including introducing family, friends, and hobbies. |
Nearpod can be used to ______.
| A．offer grammar tests |
| B．teach listening on-line |
| C．help vocabulary learning |
| D．gain fluency in speaking |
If you want to improve your speaking skills, you can go to____________.
| A．Room 501 | B．Room 502 |
| C．Room 601 | D．Room 602 |
Which of the following can assess your grammar learning?
| A．Nearpod. | B．Kahoot. |
| C．TEO. | D．Prezi. |
A teacher who wants to learn on-line teaching is expected to arrive by ______.
| A．9:00 am | B．10:30 am |
| C．2:00 pm | D．3:30 pm |