单选题 Recently, the American Heart Association surveyed 1,000 people nationwide about their thoughts on sodium and heart health. 61~ said that they believed sea salt was a low-sodium alternative to table salt. They can be forgiven for thinking so. Sea salt is marketed as a healthy food, added to soups, potato chips and a wide variety of packaged snacks labeled "low sodium", "all natural" and "healthy". But in reality, sea salt and table salt are not terribly different, at least chemically. The real differences are in how the two are used in cooking.
Table salt comes from underground salt deposits. Companies that sell it typically add something to keep it from clumping(结块). During processing, table salt is stripped of many of its natural minerals. Sea salt, on the other hand, is made from evaporated seawater. With little processing, it retains most of its minerals, which some cooks say give it a better flavor.
But both contain the same amount of sodium chloride (氧化的) by weight, which means they contribute equally to total sodium consumption and have the same effect on blood pressure. Officials recommend that adults consume no more than 2,300 milligrams of sodium a day, equivalent to a teaspoon of salt. You should eat less if you are black, hypertensive(患高血压的) or older than 40. Yet most Americans consume more than double the amount they need, mostly from processed foods, so it is best to limit salt-of any kind.
单选题 According to the survey, more than half the people believe that ______.
【正确答案】 D
【答案解析】[解析] 本题的依据句是文章的第二个句子“61% said that they believed sea salt was a low-sodium alternative to table salt”与第一个句子联系起来分析，“sodium”量少就更健康，可以判断出D项为正确答案。其他选项在文章中没有依据。
单选题 The difference between table salt and sea salt lies in that table salt ______.
【正确答案】 A
【答案解析】[解析] 本题的依据句在第二段“Companies that sell it typically add something to keep it from clumping(结块). During processing, table salt is stripped of many of its natural minerals(其矿物质很多都消失了)”。注意，此处讲的是成品盐的事情，结块是成品之前的特点。所以，可以判定A项为正确答案。C项和D项说的是海盐的特点。
单选题 The word "strip" in Para. 2 is closest in meaning to "______".
【正确答案】 C
【答案解析】[解析] “strip”意思为“消除”与“remove”是同义词。可以与上一道题同时判断。
单选题 According to the passage, the proper amount of salt consumption is related to one"s ______.
【正确答案】 B
【答案解析】[解析] 应该特别注意正确答案在文章中出现的地方。本题在原文中的信息有三条“black, hypertensive(患高血压的)or older than 40”，前两条没有在选项中出现，最后一条就是B项答案。其他选项没有在文章中出现。
单选题 According to the passage, Americans
【正确答案】 A
【答案解析】[解析] 本题的依据句是文章的最后一个句子“Yet most Americans consume more than double the amount they need, mostly from processed foods, so it is best to limit salt-of any kind.”，前半个句子就是A项的意思，所以是正确答案。