Question

¡¡¡¡If you¡¯re training for a marathon£¬ a proper plan for water intake (ÉãÈë) is important£®Of course£¬ there¡¯s the risk of dehydration (ÍÑË®)£®But athletes now know they can also get into trouble by drinking to much£®To much water intake can lower levels of sodium (ÄÆ) in the blood£®The death of a 28£­year£­old woman following the Boston Marathon caught the attention of many runners and led to new research£® ¡¡¡¡Experts advise long distance runners to replace the liquids they sweat out£®Their goal is to try to keep someone from not getting dehydrated by more than 2 percent of their body weight£® ¡¡¡¡One technique for deciding how much water you need is to get the exact numbers£®Runners have to weight themselves before and after a run to determine how much water they¡¯ve lost£®If their weight drops by more than 2 percent£¬ they have not drunk enough water£® ¡¡¡¡Hyponatremia occurs when runners drink so much water that blood salt levels drop off£®A study published last year tested 488 runners who completed the Boston Marathon and found 13 percent of them had dangerously low blood salt levels£®The first sign that runners may notice is slightly swelling in the hands£®They can¡¯t get their rings off£¬ and then they might feel sick£®They may not remember where they are£®In fact£¬ most runners get enough salt to get back to normal levels by eating just one meal after a run£®Contrary to the old advice that runners should drink as much as they can to prevent dehydration£¬ the new research has shown that the body is a remarkable machine that actually tells you via thirst when you need water£® (1) The author of this passage is primarily concerned with________ [¡¡¡¡] A£® the signs and treatment for dehydration B£® the long distance runners who need help C£® how to manage water intake during a marathon D£® a 28£­year£­old woman who died after a Boston Marathon (2) Why do runners have to weigh themselves before and after a run? [¡¡¡¡] A£® They can improve their performance in a run£® B£® They can learn how much salt there is in the blood£® C£® They ca know the quantity of water they¡¯ve lost during a run£® D£® They can decide what kind of water they should take during a run£® (3) What conclusion can we draw from the passage? [¡¡¡¡] A£® Taking much salt during a run can avoid selling in the body£® B£® Either too much or to little of water intake is harmful£® C£® A rich meal is helpful to our performance in a run£® D£® We should take enough salt during a run£® (4) According the passage£¬ which of the following statements is correct? [¡¡¡¡] A£® Too much water intake ¡úblood sodium levels ¡ý¡údehydration£® B£® Too much water intake ¡úblood salt levels ¡ý¡úhyponatremia£® C£® No water intake ¡úblood sodium levels ¡ü¡úhyponatremia£® D£® No water intake ¡úblood salt levels ¡ý¡úhyponatrenmia£®

Answer 1

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