[填空题] Weight-Loss Nirvana
A Substance That Makes Fat Mice Thin Just Might Work for Humans Too
In the US, where one in three adults is seriously overweight, the news carried by the journal Science last week -- that Friedman and his colleagues at the Howard Hughes Medical Institute and New York City’s Rockefeller University had discovered a magical dose that melts fat in a matter of weeks -- resonated with unusual force. Momentarily, at least, it encouraged the spirits of millions of lifelong dieters and boosted the stock of Amgen, the biotechnical firm based in California that holds the license on the underlying technology. It is too early to predict, however, whether this rare elixir (called leptin, after the Greek leptos, meaning slender) will be a stunning pharmaceutical (制药上的) success or just another "miracle" cure that never pans out. Even if all goes well, it could be five to ten years before leptin is approved in

[填空题] Weight-Loss Nirvana
A Substance That Makes Fat Mice Thin Just Might Work for Humans Too
In the US, where one in three adults is seriously overweight, the news carried by the journal Science last week -- that Friedman and his colleagues at the Howard Hughes Medical Institute and New York City’s Rockefeller University had discovered a magical dose that melts fat in a matter of weeks -- resonated with unusual force. Momentarily, at least, it encouraged the spirits of millions of lifelong dieters and boosted the stock of Amgen, the biotechnical firm based in California that holds the license on the underlying technology. It is too early to predict, however, whether this rare elixir (called leptin, after the Greek leptos, meaning slender) will be a stunning pharmaceutical (制药上的) success or just another "miracle" cure that never pans out. Even if all goes well, it could be five to ten years before leptin is approved in

[填空题]As Nirvana says, a person both as a sport professor and as an experienced manager is harder to obtain than______.

[填空题]Nirvana’s flagship gym is usually filled to full capacity with about 800 fitness enthusiasts most weekends.

[单项选择]A placebo is a chemically inert substance prescribed more for the mental relief of a patient than for its effect on the patient’s physical disorder. It is prescribed in the hope of instilling in the patient a positive attitude toward prospects for his or her recovery. In some cases, the placebo actually produces improvement in the patient’s condition. In discussing the use and effect of placebos, a well-known medical researcher recently paid physicians the somewhat offbeat compliment of saying that physicians were the ultimate placebo.
By comparing a physician to a placebo, the researcher sought to imply that
A. physicians should always maintain and communicate an optimistic attitude toward their patients, regardless of the prognosis.
B. the health of some patients can improve simply form their knowledge that they are under a physician’s care.
C. many patients actually suffer from imagined illnesses that are best treated by placebos.
D. physicians could prescribe less medication and achieve the same effect.
E. (E) it is difficult to determine what, if any, effect a physician’s behavior has on a patient’s condition.

[判断题]Water is a kind of chemical substance.

[填空题]Red bananas contain a substance called carotene which is also found in the vegetable known as a carrot.

[单项选择]Technically, any substance other than food that alters our bodily or mental functioning is a drug. Many people mistakenly believe the term drug refers only to some sort of medicine or an illegal chemical taken by drug addicts. They don’’t realize that familiar substances such as alcohol and tobacco are also drugs. This is why the more neutral term substance is now used by many physicians and psychologists. The phrase" substance abuse" is often used instead of" drug abuse" to make clear that substances such as alcohol and tobacco can be just as harmfully misused as heroin and cocaine. 　　We live in a society in which the medicinal and social use of substances (drugs) is pervasive: an aspirin to quiet a headache, some wine to be sociable, coffee to get going in the morning, a cigarette for the nerves. When do these socially acceptable and apparently constructive uses of a substance become misuses First of all ,most substances taken in excess will produce negative effects such as poisonin
A. stimulants function positively on the mind
B. hallucinogens are in themselves harmful to health
C. depressants are the worst type of psychoactive substances
D. the three types of psychoactive substances are commonly used in groups