题目内容
（请给出正确答案）
The searchers used NOT to believe______.
A．other stars may have the planets resembling those going around the sun
B．planet forms owing to the gas and dust in star formation
C．the formation of star is subsequent to that of planet
D．star is formed by the collapsing interstellar cloud
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更多“The searchers used NOT to believe______.A．other stars may have the planets resembling thos”相关的问题
What is NOT the finding of searchers in these years？
A．A solar system with a usual planet and an unusually huge one.
B．Gassy extra-solar planet careering about its star in short distance.
C．Huge planet orbiting in peculiar track with great gravity.
D．Solar system and Planet Earth are peculiar cosmic balls.
Why was there still hope of finding the survivors？
A．The mudslide is not as serious as the searchers expected.
B．People are more stubborn in disasters than in normal lives.
C．Searchers discovered that under the debris there is enough room to hold people.
D．People heard sound from under the debris.
Icy Microbes
In ice that has sealed a salty Antarctic 1ake for more than 2，800 years，scientists have found frozen bacteria and algae that returned to 1ife after thawing．The research may help in the search for life on Mars．which is thought to have subsurface lakes of ice．
A research team led by Peter Doran of the University of minois at Chicago drilled through more than 39 feet ice to collect samples of bacteria and algae． When Doran’s team brought them back and warmed them up a bit，they sprang back to life．
Doran said the microbes have been age-dated at 2，800 years old，but even older microbes may 1ive deeper in the ice sheet sealing the lake， and in the briny water bel0W the ice． That deeper ice and the water itself will be cautiously sampled in a later expedition that will test techniques may one day be used on Mars．
Called Lake Vida，the 4.5-square-kilometer body is one of a series of lakes located in the McMurdo Dry Valleys of Antarctica，some 2，200 kilometers due south of New Zealand．This lake has been known since the 1 950s，hut people ignored it because they thought it was just a big block of ice．While at the site for other research in the l 990s，Doran and his colleagues sent radar signals into the clear ice covering the lake and were surprised to find that 62 feet below there was a pool of liquid water that was about seven times more salty than seawater．
That prompted the researchers to return in 1996 with equipment to drill a hole down to within a few feet of the water laver． At the bottom of this hole，researchers harvested specimens of algae and bacteria．
The searchers will return in 2004 equipped with instruments that are sterilized． They will then drill through the full 62 feet of ice and sample some of the briny water from the lake for analysis．The water specimen will be cultured to see if it contains life． Specimens from the water are expected to be even older than the life forms extracted from the ice covering．
第 9 题 Paragraph 2_________．
Drug-vaccine therapy may be lifesaver for Deerfield man. Few people survive advanced melanoma, but immune therapy is giving Deerfield resident Douglas Parker a fighting chance. The 46-year-old salesman noticed a mole on his chest three and a half years ago that was found to be cancerous. Doctors removed the mole but didn't get all of the cancer. The cancer spread to other parts of his body, including his liver, where a tumor grew as large as a baseball. Parker took interferon and interleukin-2 to boost his immune system's ability to fight the cancer. The tumor shrank but didn't disappear. In au- gust, 1997, surgeons removed it, along with two-thirds of his liver. Last January, doctors discovered a new tumor on Parker's left adrenal gland(肾上腺). He received an ex- perimenta1 cancer vaccine at the University of Chicago Hospitals, but the vaccine did n' t stop the cancer from spreading to his right adrenal gland.
To augment the vaccine, doctors at Lutheran General Hospital gave Parker a new round of interleukin-2 and interferon. The drug-vaccine combination has shrunk the tumors. And while it's too early to pronounce Parker cured, immune therapy may save his life. "I want to do this to help myself as well as other people who have melanoma," he said.
Immune therapy "ultimately will be a significant change in the way we treat a lot of different cancers," said Dr. Jon Richards of Lutheran General Hospital in Park Ridge, who is testing cancer vaccine on melanoma patients. "It will be an equal partner with the other three treatments in the next five to ten years." Several drugs that bolster the immune system have been approved, and vaccines are being tested in dozens of clinical trials, including several in the Chicago area.Many of the experimental vaccines have been tested on patients with advanced melanoma who have little chance of surviving with conventional treatments alone. Researchers also have begun doing work that could lead to vaccines to treat prostate, lung, colon and other cancers.
Immune therapy alone won't cure cancer. But when used after conventional treatments, it could kill cancer cells that survive surgery, radiation or chemotherapy, re- searchers said.Some day, vaccines also might be able to prevent certain cancers. It may be possible to vaccinate against viruses and bacteria that help cause cervical, liver and stomach cancer, the National cancer Institute said.
The "fourth weapon" cures cancer by______.
A．replacing cancerous cells.
B．boosting the immune system.
C．killing cancer cells directly.
D．quickening the reproduction of cell.
Why was his attention drawn to the mountain again？
A．He was surprised to see the torches of the searchers so far away.
B．He was a little astonished to hear voices after so long.
C．He could see the men's faces in spite of the poor light.
D．He could see a shower of small rocks falling.
Drug Abuse
1 The term "drug abuse" most often refers to the use of a drug with such frequency that it causes physical or mental harm to the user or impairs social functioning. Although the term seems to imply that users abuse the drugs they take, in fact, it is themselves or others they abuse by using drugs.
2 Pharmacologists, who study the effects of drugs, classify psychoactive drugs according to what they do to those who take them. Drugs that speed up signals passing through the nervous system, which is made up of the brain and spinal cord, and produce alertness and arousal and, in higher doses, excitability, and inhibit fatigue and sleep, are called stimulants. Drugs that retard, slow down, or depress signals passing through the central nervous system and produce relaxation, a lowering of anxiety, and, at higher doses, drowsiness and sleep, are called depressants. One distinct kind of depressants are those which dull the mind's perception of pain and in medicine are used as painkillers, or analgesics. These drugs called narcotics.
3 It is not always easy to determine exactly when simple drug use becomes abuse. Thus it is far easier to study who uses illegal psychoactive drugs than it is to study who abuses them. When re searchers describe patterns of drug abuse, then, they usually describe the more general phenomenon of drug use, whether it leads to abuse or not.
4 Drinking on the job is a social and economic problem with a long history. With the growing popularity of illegal drugs in the 1960s and 1970s, it was to be expected that their use in the workplace would emerge as a major issue by the 1980s. Estimates of employee drug use vary greatly, ranging from 10 percent to 25 percent for the proportion of workers who use drugs occasionally on the job. The safe performance of some occupations among them is done by airline pilots in air traffic.
5 From the 1920s until the 1960s, treatment of drug abuse in the United States was practically nonexistent. During this period many officials did not believe that treatment was effective or necessary. Drug abusers and sellers were simply arrested and imprisoned, thereby discouraging use. The dramatic explosion in the use and abuse of a wide range of different drugs during the 1960s demonstrated the weakness of this theory. As a result, two treatment programs were developed during the 1960s.
A. Patterns of drug abuse
B. Treatment
C. Drug testing in the workplace
D. Classification of psychoactive drugs
E. Definition of drug abuse
Paragraph 1 ______.
第三篇
For years doctors have given cancer patients three main treatments: surgery, radiation and chemotheraphy. Now researchers are developing a fourth weapon: the patient' s own immune system. New vaccines(疫苗)and drugs can stimulate the production of an army of cells and antibodies that kill cancer cells.
Drug-vaccine therapy may be lifesaver for Deerfield man. Few people survive advanced melanoma, but immune therapy is giving Deerfield resident Douglas Parker a fighting chance. The 46-year-old salesman noticed a mole on his chest three and a half years ago that was found to be cancerous. Doctors removed the mole but didn't get all of the cancer. The cancer spread to other parts of his body, including his liver, where a tumor grew as large as a baseball. Parker took interferon and interleukin-2 to boost his immune system's ability to fight the cancer. The tumor shrank but didn't disappear. In au- gust, 1997, surgeons removed it, along with two-thirds of his liver. Last January, doctors discovered a new tumor on Parker's left adrenal gland(肾上腺). He received an ex- perimenta1 cancer vaccine at the University of Chicago Hospitals, but the vaccine did n' t stop the cancer from spreading to his right adrenal gland.
To augment the vaccine, doctors at Lutheran General Hospital gave Parker a new round of interleukin-2 and interferon. The drug-vaccine combination has shrunk the tumors. And while it's too early to pronounce Parker cured, immune therapy may save his life. "I want to do this to help myself as well as other people who have melanoma," he said.
Immune therapy "ultimately will be a significant change in the way we treat a lot of different cancers," said Dr. Jon Richards of Lutheran General Hospital in Park Ridge, who is testing cancer vaccine on melanoma patients. "It will be an equal partner with the other three treatments in the next five to ten years." Several drugs that bolster the immune system have been approved, and vaccines are being tested in dozens of clinical trials, including several in the Chicago area. Many of the experimental vaccines have been tested on patients with advanced melanoma who have little chance of surviving with conventional treatments alone. Researchers also have begun doing work that could lead to vaccines to treat prostate, lung, colon and other cancers.
Immune therapy alone won't cure cancer. But when used after conventional treatments, it could kill cancer cells that survive surgery, radiation or chemotherapy, re- searchers said. Some day, vaccines also might be able to prevent certain cancers. It may be possible to vaccinate against viruses and bacteria that help cause cervical, liver and stomach cancer, the National cancer Institute said.
The "fourth weapon" cures cancer by______.
A. replacing cancerous cells.
B. boosting the immune system.
C. killing cancer cells directly.
D. quickening the reproduction of cell.
Part A
Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET Ⅰ.
Text 1
Say the word bacteria, and most folks conjure up images of a nasty germ like staphylococcus or salmonella that can make you really sick. But most bacteria aren't bad for you. In fact, consuming extra amounts of some bacteria can actually promote good health. These beneficial bacteria are available without a prescription in drug and health-food stores and in foods like yogurt. So far, the best results have been seen in the treatment of diarrhea, particularly in children. But re searchers are also looking into the possibility that beneficial bacteria may thwart vaginal infections in women, prevent some food allergies in children and lessen symptoms of Crohn's disease, a relatively rare but painful gastrointestinal disorder.
So where have these good germs been lurking all your life？ In your intestines, especially the lower section called the colon, which harbors at least 400 species of bacteria. Which ones you have depends largely on your environment and diet. An abundance of good bacteria in the colon generally crowds out stray bad bacteria in your food. But if the bad outnumber the good—for example, after antibiotic treatment for a sinus or an ear infection, which kills normal intestinal germs as well—the result can be diarrhea.
For generations, people have restored the balance by eating yogurt, buttermilk or other products made from fermented milk. But nowadays, you can also down a few pills that contain freeze-dried germs. These preparations are called probiotics to distinguish them from antibiotics. Unfortunately, you can't always be sure that the bacteria in the products you buy are the same strains as those listed on the label or even that they're still alive. Probiotics are usually sensitive to both heat and moisture. Among the most promising and most thoroughly researched probiotics is the GG strain of Laetobacillus, discovered by Dr. Sherwood Gorbach and biochemist Barry Goldin, both at Tufts University School of Medicine. L-GG, as it's called, has been used to treat traveler's diarrhea and intestinal upsets caused by antibiotics. Even more intriguing, L- GG also seems to work against some viruses, including rotavirus, one of the most common causes of diarrhea in children in the U. S. and around the world. Here the effect is indirect. Somehow L-GG jump-starts the immune system into recognizing the threat posed by the virus.
Pediatricians at Johns Hopkins are studying a different bug, the Bb-12 strain of Bifidobacterium, which was discovered by researchers at CHR Hansen Biosystems. Like L-GG, Bb-12 stimulates the immune system. For reasons that are not dear, infants who are breast-fed have large amounts of bifidobacteria in their intestines. They also have fewer intestinal upsets. Dr. Jose Saavedra and colleagues at Hopkins have shown that Bb-12 prevents several types of diarrhea, including that caused by r0tavirus, in hospitalized infants as young as four months. It has also been used to cure diarrhea in children of all ages.
21. What the author mainly intends to say in the first paragraph is ______.
A) that nasty germs can make you really sick
B) that the word bacteria doesn't refer to the germs which make people sick
C) the beneficial effects that most bacteria may produce on human body
D) the possibility that beneficial bacteria may stop vaginal infections in women
How many people have died in the recent tsunami so far？
A．147,000
B．174,000
C．14,000
D．17,000
In addition to slowing job search efforts, the Internet is making the hiring process longer for the employer. In a survey of 5, 000 hiring managers by an online resume site, 72% said that a majority of the resumes they received in response to an online job posting did not match the position’s description.
“The more unrelated resumes managers have to go through in order to select the few to bring in for interviews, the longer it takes to fill the position,” points out Challenger. “One result of this has been the increased use of screening software by employers. This will make it even more difficult for job seekers get their resumes in front of the hiring executive for an interview.”
“All of this is not to say that the Internet has not revolutionized job hunting. It has certainly made it easier for someone in San Francisco, for example, to search for job opening in Miami. In addition, the ability to conduct keyword searches have reduces the amount of time it takes to find the type of position a person is seeking.”
“Job seekers must learn how to use the Internet as a tool, rather than just replying on it as a means for submitting electronic resumes,” concludes Challenger.
According to the passage, the coming of online job searching brings__________
A.longer waiting time for the unemployed
B.longer computer technology training for the job searchers
C.more unemployment throughout the U.S.A.
D.more job opportunities in the Internet world
Professor Challenger thinks unemployed______________.A.browsing the Internet job sites
B.sending resumes by mail
C.going to a traditional training center
D.meeting the potential employers in person
The internet is making the hiring process longer for the employer because__________A.the speed of the Internet is not fast enough
B.there is a lot of false information on the Net
C.the hiring position cannot be fully described in the Net
D.it has drawn many unfitting resumes
It can be inferred that “screening software” in Paragraph 3 is used to……should be considered more important by the __________.A.draw more job seekers to the websites
B.get rid of more unrelated resumes
C.serve as bridge between the job seekers and the employers
D.provide the job seekers and the employers
According to the passage, the Internet has revolutionized job hunting by__________A.changing the recession cycle
B.opening more chances for job seekers
C.improving the employment situation
D.reducing the interview time .
请帮忙给出每个问题的正确答案和分析，谢谢！
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