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What does the doctor say about aspirin
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.The decrease 1 blood pressure occurred 2 race or 3 and whether or not study participants are a "typical American diet", 4 is high in saturated fats and contains few fruits and 5 or the so-called DASH (for Dietary Approaches to Stop Hypertension)diet, which emphasizes lots of fresh 6 , low-fat diary, fish and fewer sweets and which was proved in 1997 to reduce hypertension. The biggest decrease in blood pressure in this study was recorded in subjects who ate the DASH diet and reduced their sodium 7 to 1200mg a day.Why is this significant 8 -health experts estimate that Americans consume, on average, about 3500 mg of sodium- 9 about 9 grams of salt-daily. It"s not 10 we"re that heavyhanded with the saltshaker. Most of our dietary sodium is added 11 food processing. 12 to 1200mg, you"d have to forgo most 13 foods, take-out deliveries and restaurant meals.So pay attention 14 how much salt you"re eating, but don"t forget to make fruits, vegetables and whole grains a 15 part of your diet. They"ll help 16 your cholesterol level 17 your blood pressure. Be sure to drink alcohol 18 , if at all. 19 weight-even just 4.5kg-and exercising at least 30 minutes most days of the week can also have a marked 20 on blood pressure....
Write a letter for absence (about 100 words).
Psychologist George Spilich and colleagues at Washington College in Chestertown, Maryland, decided to find out whether, as many smokers say, smoking helps them to "think and concentrate". Spilich put young non-smokers, active smokers and smokers deprived (被剥夺) of cigarettes through a series of tests.In the first test, each subject (实验对象) sat before a computer screen and pressed a key as soon as he or she recognized a target letter among a grouping of 96. In this simple test, smokers, deprived smokers and non-smokers performed equally well.The next test was more complex, requiring all to scan sequences of 20 identical letters and respond the. instant one of the letters was transformed into a different one. Non-smokers were faster, but under the stimulation of nicotine (尼古丁) , active smokers were faster than deprived smokers.In the third test of short-term memory, non-smokers made the fewest errors, but deprived smokers committed fewer errors than active smokers.The fourth test required people to read a passage, then answer questions about it. Non-smokers remembered 19 percent more of the most important information than active smokers, and deprived smokers bested those who had smoked a cigarette just before testing. Active smokers tended not only to have poorer memories but also had trouble separating important information from insignificant details."As our tests became more complex," sums up Spilich, "non-smokers performed better than smokers by wider and wider margins." He predicts, "smokers might perform adequately at many jobs-until they got complicated. A smoking airline pilot could fly adequately if no problems arose, but if something went wrong, smoking might damage his mental capacity." George Spilich"s experiment was conducted in such a way as to ______.
认真阅读下面这篇文章，设计一个教案。 桥之美 吴冠中 “我走过的桥比你走过的路还长”，现在大概很少有人用这种口吻教训后生小子了!人生一世自然都要经过无数的桥，除了造桥的工程人员外，恐怕要算画家见的桥最多了。 美术工作者大都喜欢桥，我每到一地总要寻桥。桥，多么美!“小桥流水人家”，固然具诗境之美，其实更偏于绘画的形式美：人家——房屋，那是块面；流水，那是长线、曲线，线与块面组成了对比美；桥与流水相交，更富有形式上的变化，同时也是线与面之间的媒介，它是沟通线、面间形式转变的桥!如果煞它风景，将江南水乡或威尼斯的石桥拆尽，虽然绿水依旧绕人家，但彻底摧毁了画家眼中的结构美，摧毁了形式美。 石拱桥自身的结构就很美：圆的桥洞、方的石块、弧的桥背，方、圆之间相处和谐、得体，力学的规律往往与美感的规律相拍合。不过我之爱桥，并非着重于将桥作为大件工艺品来欣赏，也并非着眼于自李春的赵州桥以来的桥梁的发展，而是缘于桥在不同环境中的多种多样的形式作用。 茅盾故乡乌镇的小河两岸都是密密的芦苇，真是密不透风，每当其间显现一座石桥时，仿佛发闷的苇丛做了一次深呼吸，透了一口舒畅的气。那拱桥的强劲的大弧线，或方桥的单纯的直线，都恰好与芦苇丛构成鲜明的对照。早春天气，江南乡间石桥头细柳飘丝，那纤细的游丝拂着桥身坚硬的石块，即使碰不见晓风残月，也令画家销魂!湖水苍茫，水天一色，在一片单纯明亮的背景前突然出现一座长桥，卧龙一般，它有生命，而且往往有几百上千年的年龄。人们珍视长桥之美。颐和园里仿造的卢沟桥只17孔，苏州的宝带桥53孔之多，如果坐小船沿桥缓缓看一遍，你会感到像读了一篇史诗似的满足。广西、云南、贵州等省山区往往碰到风雨桥，桥面上盖成遮雨的廊和亭，那是古代山水画中点缀人物的理想位置。因桥下多半是急流，人们到此总要驻足欣赏飞瀑流泉，画家和摄影师们必然要在此展开一番搏斗。 张择端在《清明上河图》里将桥作为画卷的高潮，因桥上桥下，往返行人，各样船只，必然展现生动活泼的场面，两岸街头浓厚的生活情调也被桥相连而成浓缩的画图。矛盾的发展促成戏剧的高潮，形象的重叠和交错构成丰富的画面，桥往往担任了联系形象的重叠及交错的角色，难怪绘画和摄影作品中经常碰见桥。极目一片庄稼地，有些单调，小径尽头忽然出现一座小桥，桥下小河里映着桥的倒影，倒影又往往被浮萍、杂草刺破。无论是木桥还是石桥，其身段的纵横与桥下的水波协同谱出形与色的乐曲。田野无声，画家们爱于无声处静听桥之歌唱，他们寻桥，仿佛孩子们寻找热闹。高山峡谷间，凭铁索桥、竹索桥交通。我画过西藏、西双版纳及四川等地不少索桥，人道索桥险，画家们眼里的索桥却是一道线，一道富有弹性的线!一道孤立的线很难说有什么生命力，是险峻的环境孕育了桥之生命，是山岩、树丛及急流的多种多样的线的衬托，才使索桥获得了具有独特生命力的线的效果。 南京长江大桥远看也是一道直线，直线美不美直线是否更符合新的审美观不宜笼统地提问，不能笼统地答复，艺术形式处理中，往往是失之毫厘，差之千里。为了画长江大桥，我曾爬上南京狮子山，就是想寻找与桥身的直线相衬托、呼应、引申的点、线、面!为了画钱塘江大桥，我曾两次爬到六和塔背后的山坡上，但总处理不好那庞大的六和塔与长长的桥的关系，因而构不成画面。虽然滨江多垂柳，满山开桃花，但脂粉颜色哪能左右结构之美呢!成昆路上，直线桥多，列车不断地过桥、进洞，出洞、过桥，几乎是桥连洞，洞连桥。每过环形的山谷，前瞻后顾，许多桥的直线时时划断陡坡，有时显得险而美，有时却险而不美，美与险并不是一回事。 摄影师和画家继续在探寻桥之美，大桥、小桥，各有其美。有人画鹊桥，喜鹊构成的桥不仅意义好，形式也自由，生动活泼。凡是起到构成及联系之关键作用的形象，其实也就具备了桥之美!
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