题目内容
According to the passage, how do the executives use intuition？
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【B9】
【B20】
What is the finding of the 2003 study conducted at Case Western Reserve University？
听力原文： Vitamins are essential to life. Today there are many kinds of vitamins. A deficiency in many of these can lead to illness.
Vitamin A is most important for good eyesight. But it is also important for general good health. Liver contains a large amount of vitamin A, but vitamin A is also found in fish, meat, milk, butter, and in some fruits and vegetables.
Vitamin B in fact consists of twelve different chemicals, which are found in eggs, cheese, butter, meal flour and vegetables. If a person does not have enough vitamin B in his diet, it may affect his whole body, particularly the skin, the nervous system and the heart. Deficiency in vitamin B results in a disease called beri-beri, a sort of disease in feet.
Vitamin C prevents scurvy and helps to heal wounds. Some doctors. believe that large quantities of vitamin C help people avoid colds. Fruits and uncooked vegetables are rich in vitamin C. a lack of vitamin C can cause a disease called scurvy.
Vitamin D is essential for the growth of bones and teeth and is found in fish, liver, oil and milk.
Vitamins can be produced and are sold, but a well balanced diet will provide the necessary amount of vitamins.
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