9.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.a(chǎn)ffect 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 本文主要講述了人們在現(xiàn)實生活中翹二郎腿的習慣是非常不好的,會引起身體的不適,同時就此給出了一些建議.

解答 32.B  細節(jié)題.根據(jù)文章內(nèi)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.你坐著的時候翹二郎腿肯定會覺得舒服,但是你卻沒有意識到它會對你的健康造成影響.結合選項,故選B
33.A  細節(jié)題.根據(jù)文章內(nèi)容,A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure.一項調查研究顯示,坐著的時候翹二郎腿會使你的血壓升高,結合選項,故選A
34.D  詞義猜測題.根據(jù)文章內(nèi)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.這種壓力會使得你腳和腿的肌肉麻痹,阻止你抬起腳踝,從而引起疼痛.結合選項,故選D
35.C 主旨題.根據(jù)文章內(nèi)容,主要講述了人們在現(xiàn)實生活中翹二郎腿的習慣是非常不好的,會引起身體的不適,同時就此給出了一些建議.結合選項,故選C

點評 本文是一個科教類閱讀,題目涉及多道細節(jié)理解題,做題時結合原文和題目有針對性的找出相關語句進行仔細分析,結合選項選出正確答案.推理判斷題也是要在抓住關鍵句子的基礎上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù).

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