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1、 Module 1Our Body and Healthy Habits阅读理解组块专练练速度(本栏目内容，在学生用书中以独立形式分册装订！)(限时：35分钟).阅读理解A(2018湖南长沙高三模拟二)An egg sinks to the bottom if you drop it into a glass of ordinary drinking water but what happens if you add salt? The results are very interesting and can teach you some fun facts about density (密度
2、)What youll need：*One egg *Water *Salt *A tall drinking glassInstructions：Pour water into the glass until it is about half full.Mix in lots of salt (about 6 tablespoons)Carefully pour in plain water until the glass is nearly full (be careful not to mix the salt water with the plain water)Gently lowe
3、r the egg into the water and watch what happens.Whats happening?Salt water is denser than ordinary tap water. The denser the liquid is, the easier it is for an object to float in it. When you lower the egg into the liquid it drops through the normal tap water until it reaches the salt water, and at
4、this point the water is dense enough for the egg to float. If you were careful when you added the tap water to the salt water, they would not mix, enabling the egg to amazingly float in the middle of the glass.【语篇解读】本文主要介绍了鸡蛋放入盐水中的实验过程。【段意梳理】第一部分：鸡蛋放入盐水中的实验设想。第二部分：实验所需的材料。第三部分：实验的具体操作步骤。第四部分：实验的结果及原
5、理。【难句分析】If you were careful when you added the tap water to the salt water, they would not mix, enabling the egg to amazingly float in the middle of the glass.分析：本句是一个复合句。If引导条件状语从句；when引导时间状语从句；enabling the egg to amazingly float in the middle of the glass是现在分词短语作结果状语。译文：如果你把自来水加到盐水里时比较小心的话，它们就不会混在
6、一起，这样会让鸡蛋在玻璃杯的中间奇迹般地漂浮起来。1Which of the following is the CORRECT order?Mix in lots of salt.Gently lower the egg into the water.Carefully pour in plain water until the glass is nearly full.Pour water into the glass until it is about half full.A BC D答案与解析：B细节理解题。根据第三部分的“Pour water into the glass until
7、it is about half full”和“Gently lower the egg into the water and watch what happens”可知，往杯子里倒半杯水是第一个步骤，而轻轻把鸡蛋放进水里，观察结果是最后一个步骤，故选B。2What will happen if you drop an egg into a glass of water with about 6 tablespoons of salt?AIt will float in the water.BIt will sink to the bottom.CNothing will happen.DTh
8、e result is not known.答案与解析：A推理判断题。根据第四部分中的“The denser the liquid is, the easier it is for an object to float in it”和最后一句“If you were careful when you added the tap water to the salt water, they would not mix, enabling the egg to amazingly float in the middle of the glass”可推知，鸡蛋放入盐水里会浮起来。【干扰项分析】B项错在
9、鸡蛋会沉入杯底，这是在没有放入盐的饮用水里的现象；C项错在什么都不会发生；D项错在结果不知道，这都与文章最后一部分的结论不符，故选A。3Why can the egg float in the water according to the passage?ABecause ordinary tap water is denser than salt water.BBecause ordinary tap water is as dense as salt water.CBecause the denser the liquid is, the easier it is for an objec
10、t to float in it.DBecause the more the liquid there is, the easier it is for an object to float in it.答案与解析：C细节理解题。根据最后一部分中的“Salt water is denser than ordinary tap water. The denser the liquid is, the easier it is for an object to float in it”可知，液体的密度越大，物体越容易漂浮，而鸡蛋能够在盐水中浮起来是因为盐水的密度大，故选C。B(2018银川检测)C
11、rossing your legs is an extremely common habit; most people dont even notice that theyre doing it when they sit down. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.A study published in Blood Pressure Monit
12、oring stated that sitting with your legs crossed can increase your blood pressure. The reason for this is that the blood in your legs has to work against gravity to be pumped back to your heart and that crossing one leg over the other increases resistance, making it even harder for the blood to circ
13、ulate. This causes your body to increase your blood pressure to push the blood back to the heart. You wont feel any immediate effects, but repeated, drawnout increases in blood pressure can cause longterm health issues. So, planning to sit for a long period of time? Dont keep your legs crossed.“Cros
14、sing your legs at the knee can also cause pressure on the major nerve in your leg that passes just below your knee and along the outside of your leg，” explains Richard Graves, a medical expert. This pressure can cause numbness and temporary paralysis (麻痹) of some of the muscles in your foot and leg,
15、 preventing you from being able to raise your ankle what we know as that “pins_and_needles” sensation. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.So next time you sit down, try to get yourself in
16、the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.【语篇解读】本文是一篇说明文。文章介绍了人们将一条腿放在另一条腿上(跷二郎腿)的习惯，这种行为会导致一些健康问题。【难句分析】The reason for this is that the blood in your legs has to work against gravity to be pumped back to your
