题目内容
Teenagers whose parents smoke are at risk of getting lung cancer at some time during their
查看答案
搜索结果不匹配？点我反馈
更多问题
听力原文： Have you eaten too much over the holidays？ You should try fidgeting, or moving your hands or feet for a while. Those around you might not like it, but scratching and twitching is an important way of burning up calories.
American researchers have found that some people's squirming and wiggling equals several miles of jogging each day.
The scientists, based at the National Institute of Health's laboratory in Phoenix, Arizona, are studying why some people get fat and others stay slim.
In one study, 177 people each spent 24 hours in the institute's respiratory chamber—a room where the amount of energy people expend is measured by their oxygen and carbon dioxide levels. By the end of the day, some people had burned up 800 calories in toe-tapping, finger-drumming and other nervous habits. However, others had expended only 100 calories.
The researchers found that slim women fidget more than fat women, but there was net significant difference in men. Heavy people expend more energy when they fidget than do thin people.
(23)
Compared with a non-smoker, a smoker is more likely to be at risk of contracting various cancer.
测定沥青环球软化点，要求起始温度为5℃±0.5℃，杯中水温在5min内调节至升温速度维持在5℃±0.5℃/min。()
细集料的表观密度试验，以两次平行试验结果的算术平均值作为测定值，如两次结果之差值大于0.01g/cma，应重新取样进行试验。()
微信支付 
支付宝支付