1．Crossing your legs is an extremely common habit； most people don't even notice that they're 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 Monitoring 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 circulate．This causes your body to increase your blood pressure to push the blood back to the heart．You won't feel any immediate effects，but repeated，drawn-out increases in blood pressure can cause long-term health issues．So，planning to sit for a long period of time？Don't keep your legs crossed．Crossing 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，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 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．
32．What can we learn about crossing one's legs？B
A．It is a very bad social habit．
B．It can do harm to people's health．
C．It is usually practiced deliberately．
D．It can make others feel uncomfortable．
33．According to the study，sitting with your legs crossed canA．
A．affect your blood pressure
B．resist gravity effectively
C．lead to heart attacks easily
D．improve the function of legs
34．In the third paragraph"pins and needles"probably meansD．
A．being highly flexible
B．being a little tired
C．serious muscle injuries
D．slight sharp pains
35．What is the main purpose of the text？C
A．To compare common habits．
B．To evaluate effects of an experiment．
C．To give readers some advice．
D．To introduce research methods．
分析 本文主要讲述了人们在现实生活中翘二郎腿的习惯是非常不好的，会引起身体的不适，同时就此给出了一些建议．
解答 32．B 细节题．根据文章内容，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．你坐着的时候翘二郎腿肯能会觉得舒服，但是你却没有意识到它会对你的健康造成影响．结合选项，故选B
33．A 细节题．根据文章内容，A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure．一项调查研究显示，坐着的时候翘二郎腿会使你的血压升高，结合选项，故选A
34．D 词义猜测题．根据文章内容，This pressure can cause numbness and temporary paralysis （麻痹） of some of the muscles in your foot and leg，preventing you from being able to raise your ankle-what we know as that"pins and needles"sensation．这种压力会使得你脚和腿的肌肉麻痹，阻止你抬起脚踝，从而引起疼痛．结合选项，故选D
35．C 主旨题．根据文章内容，主要讲述了人们在现实生活中翘二郎腿的习惯是非常不好的，会引起身体的不适，同时就此给出了一些建议．结合选项，故选C
点评 本文是一个科教类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，结合选项选出正确答案．推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
