[单项选择]

Where Have All Our Visitors Gone

Sixty years ago, a man named Kenneth Arnold saw something that people are still (51) today, something that changed popular culture for ever.
Flying his plane over mountains in the US state of Washington, he saw a line of strange objects, either crescent -shaped or disc-like, flying (52) the motion of a saucer skimming on water.
The media soon picked up on the story--the Flying Saucers were here! Was the earth being (53) by creatures from another planet Soon, so many sightings were made that the US military began to (54) . It called these strange objects UFOs Unidentified Flying Objects, and that is how they are (55) today.
Military investigations found no evidence of visitors from outer space. But that did not stop the true (56) . The military were (57) up, they said. Or (58) it was because the travelers from space were of
A. investigate
B. attack
C. shoot
D. confront

[单项选择]
Sixty years ago, a man named Kenneth Arnold saw something that people are still (51) today, something that changed popular culture for ever.
Flying his plane over mountains in the US state of Washington, he saw a line of strange objects, either crescent -shaped or disc-like, flying (52) the motion of a saucer skimming on water.
The media soon picked up on the story--the Flying Saucers were here! Was the earth being (53) by creatures from another planet Soon, so many sightings were made that the US military began to (54) . It called these strange objects UFOs Unidentified Flying Objects, and that is how they are (55) today.
Military investigations found no evidence of visitors from outer space. But that did not stop the true (56) . The military were (57) up, they said. Or (58) it was because the travelers from space were of
A. looking
B. seeing
C. seeking
D. feeling

[简答题]For five years I have maintained our nation’s solid commitment to scientific research and technological development, because I believe they’re essential to our nation’s economic growth and to building the right kind of bridge to the 21st century. The balanced budget I will submit in just a few weeks to Congress reflects this continued commitment. And, in my upcoming State of the Union Address, I’ll talk more about what we arc doing to keep America on the cutting edge of the scientific and technological advancements that are driving our new global economy. Still, it’s good to remember that scientific advancement does not occur in a moral vacuum. Technological developments divorced from values will not bring us one step closer to meeting the challenges or reaping the benefits of the 21st century. This week, like many Americans, I learned the profoundly troubling news that a member of the scientific community is actually laying plans to clone a human being. Personally, I believe t

[单项选择] Modern Drugs Doctors, sixty years ago, could do little to help victims of polio. Serious cases usually ended in death. In 1955, a vaccine was developed that prevented the disease. Today, polio is no longer a major health problem. Many of the most important drugs that doctors prescribe today have been developed in the last 30 years. Modern drugs are complex, specific and powerful. People need to know more about drugs in order to use them safely. Early people discovered by accident that some of the plants growing around them seemed useful to heal sores, relieve pain, or even cure diseases. These plants were the first drugs. Now plants are still the source of some drugs. Quinine, for example, is a bitter-tasting drug used to treat the chills and fever of malaria and to reduce attacks of the disease. It is made from the bark of the cinchona tree, which grows in the Andes Mountains. The Indians of that region were the first to use the bark as
A. Originally, quinine was made from some tree bark.
B. Quinine is used to cure malaria.
C. Now, the cinchona tree is no longer the only source of quinine.
D. It was the Spanish people who first used quinine as a medicine.