[填空题]The drug of acetaminophen is only found in the widely varying doses of several hundred pain relievers.

[单项选择]An English tourist found that he had only enough money in his pocket to buy the ticket. As he knew that it took only two days to go back to England he decided to spend the two days without having meals. So he bought the ticket and got on the ship. He dosed his ears to the sound of the lunch bell. When dinner time came, be refused to go to the dining hall, saying that he didn’t feel well. The next morning he didn’t go to breakfast and lunch. At dinner time be was so hungry that he could not stand(忍受)it any longer. "I’m going to eat, "be said, "even if they throw me into the sea."
At dinner he ate everything the waiter put out in front of him and got ready for the coming quarrel(争吵). "Bring me the bill(账单), "he said.
"The bill, sir " said the waiter.
"Yes, "answered the tourist.
"There isn’t any bill, "was the answer." On the ship meals are included in the money for the ticket. /

The tourist decided to have no meals these two days because ______ .
A. he wanted to be thinner
B. he didn’t feel well
C. he had no money for food

[单项选择]

A researcher studying drug addicts found that, on average, they tend to manipulate other people a great deal more than nonaddicts do. The researcher concluded that people who frequently manipulate other people are likely to become addicts.
Which of the following, if true, most seriously weakens the researcher’s conclusion（）

A. After becoming addicted to drugs, drug addicts learn to manipulate other people as a way of obtaining drugs
B. When they are imprisoned, drug addicts often use their ability to manipulate other people to obtain better living conditions
C. Some nonaddicts manipulate other people more than some addicts do
D. People who are likely to become addicts exhibit unusual behavior patterns other than frequent manipulation of other people
E. The addicts that the researcher studied were often unsuccessful in obtaining what they wanted when they manipulated other people

[填空题]Only ______ of Americans believed drug companies were generally honest.

[单项选择]It is only recent years that man found that the protection of our environment is no small matter to our lives.
A. 直到近年来人们才发现，保护环境对我们的生存至关重要。
B. 直到近年来人们才发现，环境保护在我们的生活中并不是一件小事。
C. 只需几年人们就会发现，环境保护不过是生活中的一件小事。
D. 直到前几年人们才发现，保护环境在我们的生活中不是一件容易的事情。

[填空题]The acetaminophen poisoning caused more than haft of the acute liver failure eases in the US from 1998 — 2003.

[单项选择]They had talked only for a few minutes（）they found they were of different opinions.
A. unless
B. while
C. before
D. once

[填空题]Based on the contents of acetaminophen in Tylenol Cold and Flu Severe, the maximum daily doses of the medicine for an adult is 4 grams.

[填空题]Acetaminophen, normally known as its brand name Tylenol might be poisonous if people take more than necessary doses.

[简答题]Soft Drug

[单项选择]
One of the main weapons to prevent mother-to-child transmission of the AIDS virus during birth is the drug nevirapine. But when nevirapine is used alone just once, HIV starts becoming resistant to it. Research in Botswana shows that the resistance is not long lasting and that this affordable drug does not have to be abandoned forever by infected mothers who have already taken it.
International medical guidelines call for pregnant women with advanced HIV to get a combination of AIDS drugs including nevirapine to prevent passing their infection on to their newborns during delivery. But in poor countries, combinations have been expensive and nevirapine has often been used alone, since studies have shown that a single dose can cut the transmission rate in half.
The problem is that HIV resistance builds against it quickly when used alone just once because other drugs are not present to k
A. Because the drug is not strong enough to kill all of the HIV in the body.
B. Because there may not be a susceptibility test before using the drug.
C. Because other drugs are not present to kill the virus particles that survive nevirapine.
D. Because there are too many mutations of HIV for nevirapine to deal with.

[简答题]Semantic change plays a very important role in widening the vocabulary of a language.

[单项选择]Digital recording has made （　） a significantly wider dynamic range, in recorded music.
A. for the possibility
B. the possibility is
C. it is possible
D. possible

[填空题]

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