题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 Essential Minerals: Healthy or Hazardous? A new theory says that an excess (过量) of two common minerals - iron and copper - may be behind some cases of Alzheimer's and heart disease. These minerals are essential for good health.  It's clear that most Americans over 50 get a mass of these minerals. In fact, older men consume more than double the recommended dietary allowance of iron. Not yet known, says nutrition researcher Richard Wood, PhD of the University of Massachusetts, Amherst - but he and other experts agree that if you're over 50, it's worth taking some easy steps to reduce your intake. Reconsider your multis habit. Multivitamin formulae designed for adults over 50 are typically free of iron, but it's almost impossible to find one without copper. Most health benefits for multis are unproven. Drain (流淌)before drinking. Copper tap is found in more than 80 percent of houses in this country. But newer pipes - those less than five years old — can produce higher amounts of the mineral into your drinking water.  Some filters (过滤器)also reduce levels. You can quickly sail past recommended levels of iron if you eat lots of iron-rich beef, pork, or lamb. Limit yourself to two or three small servings a week. A. Eat less red meat. B. Avoid eating meat. C. Are they really making people sick? D. You'd better not choose copper taps. E. Letting the water run for 15 to 30 seconds will wash away excess copper. F. However, an excess of them may increase damage to cells, raising the risk of disease. G. Thus, it may be safer to skip them if they're not specifically prescribed by your doctor. 答案：【1】F【2】C【3】G【4】E【5】A

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