But the success of science, both its intellectual excitement and its practical application, depends upon the selfcorrecting character of science. There must be a way of testing any valid idea. It must be possible to reproduce any valid experiment. The character or beliefs of scientists are irrelevant; all that matters is whether the evidence supports their contention. Arguments from authority simply do not count; too many authorities have been mistaken too often. I would like to see these very effective scientific modes of thought communicated by the schools and media; and it would certainly be astonishment and delight to see them introduced into politics. Scientists have been known to change their minds completely and publicly when presented with new evidence or new arguments. I cannot recall the last time a politician displayed a similar openness and willingness to change.
The passage mainly discusses（）。
But the success of science, both its intellectual excitement and its practical application, depends upon the selfcorrecting character of science. There must be a way of testing any valid idea. It must be possible to reproduce any valid experiment. The character or beliefs of scientists are irrelevant; all that matters is whether the evidence supports their contention. Arguments from authority simply do not count; too many authorities have been mistaken too often. I would like to see these very effective scientific modes of thought communicated by the schools and media; and it would certainly be astonishment and delight to see them introduced into politics. Scientists have been known to change their minds completely and publicly when presented with new evidence or new arguments. I cannot recall the last time a politician displayed a similar openness and willingness to change.
According to the passage, is most essential to scientists’work（ ）.
Nutrition is the science of food, its use within the body, and its relationship to good health. It includes the study of the major food components — protein, carbohydrates, fat, vitamins, minerals, and water — and more than fifty specific nutrients of which are composed.
Nutrition is vital to the good health of all people of all ages. When you eat, you are doing much more than simply filling an empty stomach. The food you take in ultimately feeds all the cells of the body as it makes materials for bones, skin, hair, muscles, etc. and provides the fuel for efficient operation. Too little food or too much - or worse, too much low-nutrient food — tends to lead to poor health. We now have evidence that poor nutrition may be linked to many serious diseases — among them are heart disease, stroke, and some types of cancer.
Although most people are aware of the connection between good nutrition and good health, in recent years so many conflicting c
A. Nutrition means eating what is believed to be good food.
B. Nutrition means the study of good food and its functions.
C. Nutrition means avoiding any harmful food.
D. Nutrition is the science about cuisine.
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