单选题
单选题
ground substance (基质)
The stain on his shirt is sure not to vanish（ ）.
A:disappear B:appear C:mix D:blend
Many science reports discuss medical studies that test the effect of a new drug. Usually, a large number of people is divided into two groups. Each group takes a different substance. But no one knows which group is getting which substance. One group takes the medicine being tested. Another group takes what we call an inactive substance. Medical researchers call this substance a "placebo." The word "placebo" is Latin for "I shall please." Placebo pills(宽心丸)usually are made of sugar.
Using placebos to test drugs sometimes has a surprising result. Researchers say people taking the placebo often report improvements in their health. This is known as "the placebo effect"--pain that is eased or stopped by an inactive substance. In such testing, the drug must perform better than the placebo to prove that it is effective.
Doctors have reported that the placebo effect can be used in treatment. For example, a doctor tells a patient that a new drug will stop the pain in his leg. The pill is only sugar. But the patient does not know that. He takes the pill and says his pain is gone.
Scientists are beginning to discover some physical reasons for this reaction in some people. They are learning that much of what people believe to be true comes from what the brain expects is going to happen. If the brain believes a drug will ease pain, the brain may begin physical changes in the body that can cause the expected effect. A recent examination of studies on drugs for depression found that placebos eased the depression about as well as the active drugs.
Other studies have explored the power of placebos. A study in Japan involved thirteen
people who reacted to the poison ivy (常青藤)plant. Poison-ivy causes red itchy sores(伤痕)on some people who touch it. Each person was rubbed on one arm with a harmless leaf, but was told it was poison ivy. Each person was then touched on the other arm with poison ivy, but was told it was a harmless leaf. All thirteen people developed a reaction on the arm where the harmless leaf touched their skin. Only two reacted to the poison ivy leaves.
Doctors and scientists worry that the use of placebos may not always be harmless. They say people can become victims of false doctors and others who use placebos to claim they can cure disease.
Placebo pills usually are made of ______.
A:inactive substance B:active drug C:radioactive substance D:explosive substance
A:It is a powerful substance to power the heart. B:It is a substance to cause blood vessels to relax and contract. C:It is a substance flowing from the heart to all over the body. D:It is the substance that controls blood pressur
The stain on his shirt is sure not to vanish.
A:disappear B:appear C:mix D:blend
{{B}}第三篇{{/B}}
| ? ?Many science reports discuss medical
studies that test the effect of a new drug. Usually, a large number of people is
divided into two groups. Each group takes a different substance. But no one
knows which group is getting which substance. One group takes the medicine being
tested. Another group takes what we call an inactive substance. Medical
researchers call this substance a "placebo." The word "placebo" is Latin for "I
shall please." Placebo pills(宽心丸)usually are made of sugar. ? ?Using placebos to test drugs sometimes has a surprising result. Researchers say people taking the placebo often report improvements in their health. This is known as "the placebo effect"--pain that is eased or stopped by an inactive substance. In such testing, the drug must perform better than the placebo to prove that it is effective. ? ?Doctors have reported that the placebo effect can be used in treatment. For example, ?a doctor tells a patient that a new drug will stop the pain in his leg. The pill is only sugar. But the patient does not know that. He takes the pill and says his pain is gone. ? ?Scientists are beginning to discover some physical reasons for this reaction in some people. They are learning that much of what people believe to be true comes from what the brain expects is going to happen. If the brain believes a drug will ease pain, the brain may begin physical changes in the body that can cause the expected effect. A recent examination of studies on drugs for depression found that placebos eased the depression about as well as the active drugs. ? ?Other studies have explored the power of placebos. A study in Japan involved thirteen people who reacted to the poison ivy (常青藤)plant. Poison-ivy causes red itchy sores(伤痕)on some people who touch it. Each person was rubbed on one arm with a harmless leaf, but was told it was poison ivy. Each person was then touched on the other arm with poison ivy, but was told it was a harmless leaf. All thirteen people developed a reaction on the arm where the harmless leaf touched their skin. Only two reacted to the poison ivy leaves. ? ?Doctors and scientists worry that the use of placebos may not always be harmless. They say people can become victims of false doctors and others who use placebos to claim they can cure disease. |
A:inactive substance B:active drug C:radioactive substance D:explosive substance
下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。
{{B}}第一篇{{/B}}
| {{B}}? ? ? ? ? ? ?
? ? ? ? Political Spins{{/B}} ? ?Last week, US White House spokesman Tony Snow sent journalists digging for their dictionaries. He called recent criticism by the former President Bill Clinton ."chutzpah" (大胆放肆). With just one sentence, Snow managed to make headlines, a joke and a defense of President George W. Bush. Interestingly, this is how battles are fought and won in US politics - with carefully-worded one-liners (一行字幕新闻) made for TV which often lack substance and clarity (清晰度). ? ?"The amount of information that candidates attempt to communicate to people is actually getting smaller and smaller," said Mark Smith, a political science professor at Cedarville University. This has been accompanied by a changing media environment, Smith said. In 1968, the average TV or radio soundbite (演讲中的句子或短语) was 48 seconds, according to Smith. In 1996, the average soundbite had shrunk to 8 seconds. Thus, politicians wanting publicity try to make their public communication as quotable as possible. ? ?Campaigning politicians also use 30-second TV ads and clever campaign slogans to boost their messages. Republican presidential candidate John McCain rides to campaign stops in a bus named the "Straight-Talk Express". McCain hopes the name will convince voters he plans to tell people the truth - whether it’s in fashion or not. Democratic presidential candidate Hillary Clinton, on the other hand, has chosen the campaign slogan "Let the conversation begin". She hopes it will help her appear open-minded and friendly. ? ?But one-liners, TV ads and campaign slogans all have a single key ingredient: something commonly called political "spin". Brooks Jackson, a former journalist and the currant director of the non-partisan (无党派的) website FactCheck.org, calls spin "just a polite word for deception (欺骗)." ? ?"I do believe that very often politicians believe their own spin," said Jackson. ? ?"Strong partisans suffer from a universal human tendency: They ignore the evidence that would force them into the uncomfortable position of having to change their minds and admit that they were wrong." |
A:They are unclear B:They contain a lot of information C:They lack substance D:They are carefully constructed
汉译英：“物质；污点；表面疵点”正确的翻译为( )。
A:substance；stain；surface defect B:stain；substance；surface defect C:substance；surface defect；stain D:surface defect；stain；substance
汉译英：“物质；污点；表面疵点”正确的翻译为( )。
A:substance；stain；surface defect B:stain；substance；surface defect C:substance；surface defect；stain D:surface defect；stain；substance
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