2017年高考一輪復習黃金學案――Unit 2  Healthy eating（必修三）

答案：  1.both  屬both…and….固定搭配，意為：……和……兩者都；  2.which/ that  考查限制性定語從句，先行詞是物，：  3.making  現在分詞短語做結果狀語：  4.its  指代前面的名詞plain，考查形容詞性物主代詞；  5.for  overflow for miles表示淹沒持續了—段距離。  6.so   so many+可數名詞復數，so much+不可數名詞表“那么多的……”  7.have built  考查動詞的現在完成時態：  8.as  as引導的時間狀語從句，表“隨著……”  9.until   until now表“直到現在”：  10.despite  根據上下文此處需要使用“盡管……但是”，由于后面是名詞短語，不能用though等。3. 閱讀理解閱讀下列短文，從每題所給的a、b、c和d項中，選出最佳選項，并在答題卡上將該項涂黑。詞數：408完成時間：8分鐘難度：   it doesn't take a rocket scientist to figure out that there are better things you could do for your health than take deep breaths on a smoggy day. a growing pile of research suggests that even relatively low levels of air pollution may be more harmful than previously realized, to both heart and lungs. the latest salvo from researchers, published this week in the new england journal of medicine, focuses on how particulate (微粒) matter from air pollution affects lung (肺) function.   according to an american lung association report, particulate pollution refers to the mix of solid and liquid particles in the air that can come from natural sources, such as dust storms or wildfires, or from such human activity as the burning of fossil fuels in factories or the use of diesel (柴油機) engines. other particulates are produced when certain chemicals and substances react with one another in the atmosphere.   the effect of low levels of particulate pollution found in many urban areas is not unlike secondhand smoke, exports say. studies show that short-term adverse effects from particulates include diminished lung function, coughing, wheezing, cardiac arrhythmias and heart attacks. long-term exposure can also worsen asthma, slow normal lung growth, damage lung airways, and increase the risk of dying from lung cancer and cardiovascular disease.    certain populations, such as the very old and the very young, are the most vulnerable to air pollution. however, even the most alarming studies conducted in the most polluted areas suggest that the average person's individual risk from exposure (暴露) is very slight. relative risk numbers often seem more frightening than they actually are. for example, an earlier study published in the new england journal of medicine found that short-term exposure to traffic fumes tripled ( 成為3倍)  the risk of heart attacks in heart-attack survivors. what's easily forgotten, says rilkin, is that the risk was extremely small to start with. jogging, for example, could elevate (提高) the risk of a heart attack by a similar amount, says robert brook, a cardiac physician at the university of michigan.