Alzheimer’s disease（早老性痴呆病）is a major national health problem．Nearly 2 million Americans over the age of 65 have Alzheimer’s disease．It is a leading cause of death among the elderly．But Alzheimer’s disease is not confined（限于）to the aged．There may be a million or more people under the age of 65 suffering from the disease．
At one time．people suffering from the disease were said to be“getting old”．The disease was thought to be a natural part of growing old，but it is now known that Alzheimer’s disease strikes young and old alike．It is an organic disease that destroys brain cells．
Alzheimer’s disease affects the patient’s memory，speech and movement．In the beginning stages of the disease，the patient may seem slightly confused．He may have trouble in speaking．
Then the patient’s memory begins to fail．He may forget dates，telephone numbers，names and plans．
As the disease progresses．the patient may not recognize his family and friends．These symptoms（症状）often cause terrible anxiety in the patient．He may feel lost and frightened．Sometimes the patient reacts with wild and bad behavior．
In the last stages of the disease．the patient may not be able to take care of himself．He may have lost the ability to speak and walk．
Scientists don’t know exactly what causes Alzheimer’s disease．It may be caused by a virus or a poisonous substance in the environment．At present，there is no cure for the disease．But there are ways to slow its progress．Exercise and physical treatment can help the patients of this disease．
72．The main idea of the passage is that Alzheimer’s disease______________．
A．is a terrible part of the aging process B．is an organic disease that affects young and old
C．can be cured by physical treatment D．causes forgetfulness
73．All of the following are symptoms of Alzheimer’s disease EXCEPT___________．
A．forgetfulness B．difficulty in speaking
C．loss of sight D．loss of the ability to walk
74．According to the passage，which of the following may be a cause of Alzheimer’s disease?
A．Poisons produced by the brain． B．Getting old．
C．A virus． D．Lack of exercise．
75．The progress of Alzheimer’s disease can be slowed by_____________．
A．operation B．a change in environment
C．medicines D．physical treatment and exercise
Just getting accepted to an American college or university does not guarantee that you will get a visa. And getting a visa just lets you arrive in the United States. It does not guarantee that an immigration officer will permit you to enter the country.
If you are requesting a visa for the first time, you will probably have to go to an American embassy or consulate（领事馆）. You will need to bring a government form sent to you by your American school that shows you have been accepted.
You will also need banking and tax records that show you have enough money to pay for your education. And be prepared to provide evidence that you will return to your home country after your studies end.
All of this is important in satisfying the requirements to get a visa. A consular official will also take your picture and your fingerprints.
Foreign students must contact their local embassy or consulate to request an interview and to get other information. This includes directions about how and where to pay the visa application charge. The cost is two hundred dollars.
You should apply for the visa as soon as you have been accepted to a school in the United States. The government needs time to perform a background investigation.
You cannot receive a visa more than one hundred twenty days before the start of your program. And if you are coming as a student for the first time, you cannot enter the country more than thirty days before classes begin.
Once you come to the United States, you can stay for the length of your period of study. Your school is required to provide the Department of Homeland Security with reports on your status as a student.What do you have to take to the American embassy if you request a visa for the first time?
A. A government form. B. Banking and tax records.
C. Pictures and fingerprints.D. Both A and B.When should you apply for a visa?
| A．The moment you have been accepted to a school in the US. |
| B．One hundred twenty days before you go to the US. |
| C．Thirty days before classes begin. |
| D．After the immigration officer permit you to enter the US. |
How much will you be charged for the visa application?
| A．Free of charge. | B．Two hundred dollars. |
| C．One hundred twenty dollars. | D．Thirty dollars. |
What may be the main idea of this passage?
| A．When to get a visa. |
| B．Some tips on how to get a visa. |
| C．How to enter the US. |
| D．Ways to be accepted by American universities. |
Without proper planning, tourism can cause problems. For example, too many tourists can crowd public places that are also enjoyed by the inhabitants of a country. If tourists create too much traffic, the inhabitants become annoyed and unhappy. They begin to dislike tourists and to treat them impolitely. They forget how much tourism can help the country’s economy. It is important to think about the people of a destination country and how tourism affects them. Tourism should help a country; keep the customs and beauty that attract tourists. Tourism should also advance the wealth and happiness of local inhabitants.
Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to work in the tourism industry. This means that other parts of the country’s economy can suffer.
On the other hand, if there is not enough tourism, people can lose jobs. Businesses can also lose money. It costs a great deal of money to build large hotels, airports, air terminals, first –class roads, and other support facilities（配套设备）needed by tourist attractions. For example, a major international class tourism hotel can cost as much as 50 thousand dollars per room to build. If this room is not used most of the time, the owners of the hotel lose money.
Building a hotel is just a beginning. There must be many support facilities as well, including roads to get to the hotel, electricity, sewers to handle waste, and water. All of these support facilities cost money. If they are not used because there are not enough tourists, jobs and money are lost.The underlined word “inhabitants” probably means _________.
| A．tourists | B．passengers |
| C．population | D．citizens |
Too much tourism can cause all these problems EXCEPT ___________.
| A．a bad effect on other industries |
| B．a change of tourists’ customs |
| C．over-crowdedness of places of interest |
| D．pressure on traffic |
It can be inferred from the text that ________.
| A．the author doesn’t like tourism developing so fast |
| B．local people will benefit from tourist attraction |
| C．other parts of a country’s economy won’t benefit from tourism |
| D．we can’t build too many support facilities |
The author thinks it is good for local people to know that tourism will ___________.
| A．waste a lot of money |
| B．weaken their economy |
| C．help establish their customs |
| D．help improve their life |
Over the next 20 years, we are going to send more and better robots to Mars. Those robots will send back better pictures, maps, samples, and weather reports. There is a limit to what robots can tell us, though, so eventually we will have to send people to study the planet.
Before people can visit Mars, we need to invent a spaceship that can take us there. Mars is very far away. Depending on where Mars and Earth are in their orbits around the sun, it could take between six months to a year to get there.
The moon is much closer, and we were there, 25 years ago. Over the next 10 years, we are going to work on building a new spacecraft that can go to the moon. Using this craft, we will practice the skills we need to go to Mars.
Once we return to the moon, we are going to build a station so that people can live and work on the moon for months at a time. This is important so that we have a place to start from when we want to visit Mars, but it is also important because it gives us practice （实际经历）with living away from Earth.
By the time you are old enough to be an astronaut, we will have people spending months on the moon. By the time you are old enough to be a commander of a space mission, we will be taking trips to Mars. By the time your kids are old enough to be astronauts, we may have people living on Mars. Wouldn’t it be cool to get a postcard from someone who was building a house on Mars? Wouldn’t it be cooler if it was you who sent the postcard?We eventually have to send people on Mars because_________.
| A．robots could not send back pictures |
| B．robots can’t tell us all we want to know |
| C．robots are controlled by us humans |
| D．robots are no longer of any use to us |
A space station on the moon is important because_________.
| A．it gives us experience with living on other planets |
| B．people can plant crops in it |
| C．the new spacecraft can only land in it |
| D．it is a place for astronauts to have fun |
The author of the passage_________.
| A．thinks that trips to the moon are impossible |
| B．encourages all kids to become astronauts |
| C．hopes to receive a postcard from the moon |
| D．thinks people’s dream of living on Mars may come true |
I was working as an intern(实习生) at my University’s Museum of Natural history when I was an undergraduate in college. One day while working at the cash register in the gift shop, I saw an elderly couple come in with a little girl in a wheelchair.
As I looked closer at this girl, I saw that she was kind of perched(位于高处) on her chair. I then realized that she had no arms or legs, just a head, neck and upper body. She was wearing a little white dress with red dots.
As the couple wheeled her up to me I was looking down at the register. I turned my head toward the girl and gave her a wink(眨眼), As I took the money from her grandparents, I looked back at the girl, who was giving me a nicest, largest smile I had ever seen. All of a sudden her handicap was gone and all I saw was this beautiful girl, whose smile just melted me and almost instantly gave me a completely new sense of what life is all about. She took me away from a poor, unhappy college student and brought me into her world; a world of smiles, love and warmth.
That was 10 years ago. I’m a successful business person now and whenever I get down and think about the troubles of the world, I think about that little girl and the unforgettable lesson about life that she taught me.In the writer’s opinion, the little girl_________.
| A．had no influence on his life |
| B．sponsored him to do his business |
| C．had a cheerful spirit |
| D．told everyone how to live a good life |
What do we know about the writer?
| A．He ran a gift shop in the university |
| B．He looked down upon the girl because she had no arms and legs |
| C．He just graduated from university |
| D．He is successful in his business |
The underlined word “handicap” in Paragraph 3 probably means_________.
| A．disappointment | B．appearance |
| C．disability | D．impression |
When your pet has an emergency, first aid is not a substitute for veterinary treatment. However, before you are able to get your pet to a veterinarian（兽医）, knowing some basic first aid can help.
Bite Wounds
Approach the pet carefully to avoid getting bitten. Wear a mask for the animal and then check the wound. Clean the wound with large amounts of saline(盐水). If these are not available, then regular water may be used. Wrap large open wounds to keep them clean.
Bleeding
Apply firm, direct pressure over the bleeding area until the bleeding stops. Hold the pressure for at least 10 minutes. Avoid bandages that cut off circulation.
__________
Check to see if the animal is choking on a foreign object. If an animal is not breathing, place it on a firm surface with its left side up. Check for a heartbeat. If you hear a heartbeat but not breathing, close the animal’s mouth and breathe directly into its nose—not the mouth—until the chest expands. Repeat 12 to 15 times per minute.
Burns
Wash the burn immediately with large amounts of cool, running water. Apply an ice pack for 15—20 minutes. Do not place an ice pack directly on the skin. Wrap the pack in a light towel or other cover. If the animal has large quantities of dry chemicals on it skin, brush them off. Water may activate some dry chemicals.
Fractures (骨折)
Symptoms include pain, inability to use a limb (腿). Wear a mask for the pet and look for bleeding. If you can control bleeding without causing more injury, then do so. Watch for signs of shock. Don’t try to set the fractures by pulling the limb. Transport the pet to the veterinarian immediately, supporting the injured part as best as you can.The underlined word “substitute” in the first paragraph means something_________.
| A．that is necessary |
| B．that can replace other things |
| C．that is familiar with us |
| D．that can calm people |
What’s the suitable subtitle for the blank（空白处）?
| A．Cutting | B．Breathing Stops |
| C．Poisoning | D．Suffering Heart Problems |
If your pet is burned by chemicals, you should_________.
| A．wash away the chemicals with saline |
| B．put an ice pack directly on the skin |
| C．bind up the cut with a bandage |
| D．get rid of them before washing |
The passage is mainly about_________.
| A．doing pet first aid |
| B．treating sick pets |
| C．dealing with an emergency |
| D．working as a veterinarian |