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根据下列短文，回答下列各题。 A panel of government officials is worried．The air quality in
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The author suggests that you purchase table linens made of________．
根据下列短文，回答下列各题。 Exercise，everyone advises!But immediately，when you try，you run into trouble．Thereis so much contradictory，sometimes in correct advice about exercising that become confused．Test yourself on the following true-false quiz．It tell you what you need to know． 1．To lose weight you should always“work up a good sweat”when exercising． False．Sweating only lowers body temperature to prevent overheating；it does not help you reduce weight．You may weigh less immediately after a Workout，but this is due to water loss．Once you replace the liquid，you replace the weight. 2．You bum more calories jogging one mile than walking the same distance． False．You use，the 8aRle amount of energy whether you walk or jog the mile，since inboth cases you are moving the sanle weight the 8anle distance．The speed doesn’t matter．ofcourse，if you jog rather than walk for 30 minutes，youll cover more distance，and thereforeburn more calories． 3．If your breathing doesn’t return to normal within minutes after you finish exercising，youve exercised too much． True．Five minutes or so after exercising，your breathing should be normal，your heartshouldn’t pounding，and you shouldnt exhausted．Beneficial exercise is not too difficult，un-pleasant，and exhausting；it is enjoyable and refreshing． 4．Walking is one of the best exercises． True．Walking helps circulation of blood throughout the body，and thus has a direct effect on your overall feeling of health． The underlined phrase work up in Quiz 1 means_________．
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