英语 Unit 21 Human Biology Section I Warm up Super Athletes Preparing课件 北师大版选修7 课件VIP免费

理基础·自主初探提素能·语篇突破 Unit 21 Human Biology 众所周知，疾病总是困扰我们的健康，有些秘诀可以帮助我们保持健康。 Four Secrets To Never Getting Sick Ever wonder why you always seem to come down with a life interrupting virus this time of year，while other women you know sail through the seasons sniffle free，cough free，and ache free? Follow these simple steps to boost your virus protection： Make Friends With Fresh Air Not only does escaping into the fresh air give you a break from all those germs circulating inside，but going for a stroll can actually boost your immunity. Relaxation Fights Off Colds Being stressed will increase your susceptibility to catching a cold.That may be because，over the long term，it leads to the ongoing release of stress hormones (荷尔蒙)，such as glucocorticoids(粮皮质激素)． Clean Hands Are Everything Cold and flu can spread all too easily through touch.Keep your fingers away from your eyes，nose，and mouth as much as possible，and make sure to master the art of handw ashing.Soap and water remain your most effective tools there. Enough Sleep Is The Magic Bullet An occasional restless night is nothing to worry about，but a continuous lack of sleep can hamper your immune(免疫)system's ability to function.Anything short of seven hours nearly triples your odds of catching a cold. 1．boost vt. 促进；使增加 2．stroll n. 漫步；闲逛 3．susceptibility n. 敏感性；易感性 4．lead to 导致 5．hamper vt. 妨碍；阻止 1．Why do we often wash our hands in order not to catch a cold? _______________________________________________ _______________________________________________ 2．How can cold and flu spread? _______________________________________________ _______________________________________________ 【答案】 1.B...