Evidence is increasing that common influenza viruses are becoming resistant to the main drug used to treat them. The drug is oseltamivir, also known as Tamiflu.

The most common ___41___ flu virus found in the United States this year is type A (H1N1). During the last flu season, twelve percent of H1N1 viruses ___42___ in the United States were resistant to Tamiflu. This year, researchers at the Centers for Disease Control and Prevention say ___43___ is close to 100 percent. Still, they say early reports show that flu___44___ has been low so far this year.

The research team is reporting its findings in the Journal of the American Medical Association. Alicia Fry led the team. Doctor Fry says it is better to prevent the flu than to have to ___45___ it. And the best form of prevention, she says, is getting vaccinated (进行预防接种) each year against influenza.

Viruses change, or mutate, (变异) so flu vaccines must be reformulated each year to target the most common threats.

But last week, two teams working ___46___ reported a discovery that could help lead to a universal flu vaccine. The hope is to develop a vaccine that could give ___47___ protection against a majority of flu viruses, including bird flu.

The scientists ___48___ a protein that inactivates the flu virus before it can mutate.

One team used an antibody found in blood donated by an individual. Scientist Ian Wilson at the Scripps Research Institute in California says the antibodies proved ___49 ___ effective in laboratory mice exposed to deadly levels of virus. He says they gave complete protection .

The evidence for harmony may not be obvious in some families. But it seems that four out of five young people now get on with their parents, which is the opposite of the popularly-held image （形象）of unhappy teenagers locked in their room after endless family quarrels.

An important new study into teenage attitudes surprisingly shows that their family life is more harmonious than it has ever been in the past. “We were surprised by just how positive today’s young people seem to be about their families,” said one member of the research team. “They’re expected to be rebellious（叛逆的）and selfish .but actually they have other things on their minds: they want a car and material goods, and they worry about whether school is serving them well. There’s more negotiation（商议）and discussion between parents and children, and children expect to take part in the family decision-making process. They don’t want to rock the boat.”

So it seems that this generation of parents is much more likely than parents of 30 years ago to treat their children as friends. “My parents are happy to discuss things with me and willing to listen to me," says 17-year-old Daniel Lazall. “I always tell them when I’m going out clubbing. As long as they know what I’m doing, they’re fine with it.” Susan Crome, who is now 21, agrees. “Looking back on the last 10 years, there was a lot of what you could call negotiation. For example, as long as I’d done all my homework, I could go out on a Saturday night. But I think my grandparents were a lot stricter with my parents than that.”

Maybe this positive view of family life should not be unexpected. It is possible that the idea of teenage rebellion is not rooted in real facts. A researcher comments, “Our surprise that teenagers say they get along well with their parents comes because of a brief period in our social history when teenagers were regarded as different beings. But that idea of rebelling and breaking away from their parents really only happened during that one time in the 1960s when everyone rebelled. The normal situation throughout history has been a smooth change from helping out with the family business to taking it over.”

41. What is the popular image of teenagers today?

A. They worry about school.                        B. They dislike living with their parents.

C, They have to be locked in to avoid troubles.  D. They quarrel a lot with other family members.

42. The study shows that teenagers don’t want to__________ .

A. share family responsibility                                B. cause trouble in their families

C. go boating with their family                          D. make family decisions

43. Compared with parents of 30 years ago, today’s parents__________ .

A. go to clubs more often with their children          B. are much stricter with their children

C. care less about their children’s life                 D. give their children more freedom

44. According to the author, teenage rebellion__________ .

A. may be a false belief                                    B. is common nowadays

C. existed only in the 1960s                               D. resulted from changes in families

45. What is the passage mainly about?

A. Negotiation in family.                                         B. Education in family.

C. Harmony in family.                          D.Teenage trouble in family.

Plants can’t communicate by moving or making sounds, as most animals do. Instead, plants Produce volatile compounds, chemicals that easily change from a liquid to a gas. A flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as Bugs and bees.
Plants can also detect volatile compounds produced by other plants. A tree under attack by Hungry insets, for instance, may give off volatile compounds that let other trees know about the Attack. In response, the other trees may send off chemicals to keep the bugs away ——or even  Chemicals that attract the bugs’ natural enemies.
Now scientists have created a quick way to understand what plants are saying: a chemical Sensor（传感器）called an electronic nose. The “e-nose” can tell compounds that crop plants make When they’re attacked Scientists say the e-nose could help quickly detect whether plants are being Eaten by insects. But today the only way to detect such insects is to visually inspect individual Plants. This is a challenging task for managers of greenhouses, enclosed gardens than can house Thousands of plants.
The research team worked with an e-nose than recognizes volatile compounds. Inside the device, 13 sensors chemically react with volatile compounds Based on these interactions, the e-nose gives off electronic signals that the scientists analyze using computer software.
To test the nose, the team presented it with healthy leaves from cucumber, pepper and tomato plants, all common greenhouse crops. Then scientists collected samples of air around damaged leaves from each type of crop, These plants had been damaged by insects, or by scientists who made holes in the leaves with a hole punch（打孔器）. The e-nose, it turns out, could identify healthy cucumber, pepper and tomato plants based on The volatile compounds they produce, It could also identify tomato leaves that had been damaged. But even more impressive, the device could tell which type of damage ---- by insects or with a hole Punch ---- had been done to the tomato leaves.
With some fine-tuning, a device like the e-nose could one day be used in greenhouses to quickly spot harmful bugs, the researchers say. A device like this could also be used to identify fruits that are perfectly ripe and ready to pick and eat, says Natalia Dudareva, a biochemist at Purdue University in West Lafayette, Ind. who studies smells of flowers and plants. Hopefully, scientists believe, the device could bring large benefits to greenhouse managers in the near future.
【小题1】We learn from the text that plants communicate with each other by____.

American scientists have developed the first material that repairs itself. The material is a form of plastic that has been engineered to fill breaks in its surface.
Plastics are used today in everything from airplane wings to hundreds of object found in the home. Scientists wanted to find a way to make objects made of plastic last longer. The researchers hope their new discovery can be used to make objects that are difficult or impossible to replace.
The surface of plastic objects breaks over time. Very small breaks develop every time a plastic object is used. The researchers wanted to find out how to stop plastic from developing small breaks that weaken and destroy it. They found the answer in the chemical structure（构造）of plastic itself.
Plastic is made of monomers（单体）. These monomers link together to form polymers（聚合物）. Polymers give plastic its ability to be shaped and its strength. The research team found a way to make plastic that contains very small balloons filled with monomer liquid（液体）. When the new plastic cracks（裂开）, the monomer liquid is let out and flows into the crack. Thus the break is repaired. The repaired plastic has seventy – five percent of the strength of undamaged plastic.
The new self – repairing plastic is not yet ready for production. But it has several possible uses. One could be in space vehicles where parts cannot be repaired or replaced. Another possible use might be in bridges. And it could be used in people, to replace bone joints that have become broken or damaged.
72．Which of the following can be the best title for the article?
A．Ever-Lasting Material Invented.
B．The Chemical Structure of Plastic.
C．Plastic that Repairs Itself.
D．Small Balloons that Makes Plastic Stronger.
73．We know from the passage that the repair is done as        .
A．the cracked plastic parts are changed
B．the plastic is made
C．the liquid is put into the plastic cracks
D．the plastic cracks
74．The scientist are planning to use the new material in space vehicles, bridges and people because         .
A．the plastic parts in them are required to last longer
B．the plastic parts in them are easily broken or damaged
C．the new material cannot be used elsewhere
D．they want to experiment in these places first
75．What can we know about the new material mentioned in the passage?
A．It is a kind of liquid that is commonly used.
B．It is more difficult to make than common plastics.
C．Its surface does not crack so easily as other ones.
D．It makes it difficult or impossible to replace plastic objects.

  You're rushing to get out of the door for a meeting, but you just can't seem to find your car keys. Or you've got tickets booked for a Caribbean cruise(坐船旅行) , but your passport disappeared. Or maybe you've just come back from a grocery store tour and realized…Hey, did I leave my baby in the checkout line?

     Ok, you've probably never gone to the extremes of our last example (we hope), but most of us experience slip - ups like these on a daily basis. No matter how smart you may be, it doesn't mean your brain won't turn to Swiss cheese every so often, and no amount of e-mail reminders can help you remember where you left your TV remote or lucky penny.

     But now, there is a new pair of eyeglasses that can help to find all those little things you know must be around somewhere :  Let's call it Vision 2.0.

     The new glasses, which are being developed in a Japanese lab under the code name Smart Goggles,are similar to a Google search engine for your eyes. The high - tech glasses come with a camera that records everything you see on a daily basis, and boast built - in object recognition software that allows them to keep track of whatever comes across their field of vision. If you've got a collection of art sculptures that the camera can't recognize immediately, no problem :  Just say the name of each item,  and the glasses will memorize them right away.

     The Smart Goggles' superb tracking abilities mean that whenever you're looking for your keys, your overdue library book, or yes, even your baby, all you have to do is to say the word and the Goggles' camera will show you the last time your desired object appeared on screen, telling exactly where you'll be able to find it.

     Though the glasses are still too big for general use, the research team in Japan believes that they'll be able to make the modem glasses smaller to the size of normal glasses in the near future, making them the perfect new accessory for yourself or any other absent - minded Professor you know.

      With these intelligent designs, you'll never lose anything again. Except maybe your glasses.

1.The best title for the passage should be _______.

A. A Habit of Forgetting Small Things  

B. Usage of New High - Tech Glasses

C. How to Find Little Things Easily

D. Glasses Will Help Find Your Things

2.Which of the following is a slip - up according to the passage?

A. You can't find your watch before going to work.

B. You can't work out a math problem in given time.

C. You don't know how to deal with a naughty boy.

D. You don't know how to get to a hospital.

3.Which of the following statement is true about Smart Goggles?

A. They're a search engine used on the Internet.

B. They're a camera with recognition software.

C. They're software used in computers.

D. They're sunglasses protecting our eyes.

4.Where are the new glasses being developed?

A. In China.          B. In America.      C. In Japan.          D. In France.