Question

    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 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 problems. So, panning 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 of some of the muscles in your foot and leg, preventing you from being able to raise your ankle. 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.

1.What can we learn about crossing one’s legs?

A.It is a very bad social habit. B.It is usually practiced by design.

C.It can make others feel uncomfortable. D.It has a negative effect on people’s heath.

2.We may conclude from the study that sitting with your legs crossed can ________.

A.improve the function of legs B.help your blood resist gravity

C.effect your blood pressure D.cause health problems instantly

3.According to Richard Graves, repeatedly crossing your legs may ________.

A.paralyze all of your muscles B.preventing you from standing up

C.damage your nerve in the leg in the end D.reduce the pressure on the major nerve

4.What is the main purpose of the text?

A.To blame a bad habit. B.To provide suggestions.

C.To introduce research methods. D.To show effects of an experiment.

Answer

1.D

2.C

3.C

4.B

【解析】

这是一篇说明文。文章说明了虽然跷二郎腿坐着很舒服，但这可能会导致你没有意识到的健康问题。有研究表明，跷二郞腿坐着会增加血压，并说明了这一动作是如何导致血压升高并导致长期健康问题的。也有医学专家指出，反复跷二郎腿最终可能会损伤你的腿部神经。所以建议试着让自己养成双脚着地坐着的习惯。

1.

细节理解题。根据第二段中A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure.可知发表在《血压监测》上的一项研究表明，跷二郞腿坐着会增加血压。以及You won’t feel any immediate effects, but repeated, drawn-out increases in blood pressure can cause long term health problems.可知你不会立即感觉到任何影响，但是持续不断的血压升高会导致长期的健康问题。由此可知，跷二郎腿对人们的健康有负面影响。故选D。

2.

推理判断题。根据第二段中A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason 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 problems.可知发表在《血压监测》上的一项研究表明，跷二郞腿坐着会增加血压。原因是，腿部的血液必须与重力对抗，才能被泵回心脏，而跷二郎腿会增加阻力，使血液更难循环。这会导致你的身体增加你的血压，推动血液回到心脏。你不会立即感觉到任何影响，但是持续不断的血压升高会导致长期的健康问题。由此从研究中得出结论，跷二郎腿坐着会影响你的血压。故选C。

3.

细节理解题。根据第三段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 of some of the muscles in your foot and leg, preventing you from being able to raise your ankle. 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.可知医学专家Richard Graves解释说，在膝盖处交叉双腿也会对膝盖下方和腿外侧的主要神经造成压力。这种压力会导致脚部和腿部的一些肌肉麻木和暂时瘫痪，使你无法提起脚踝。虽然不适的感觉可能只持续一到两分钟，但反复交叉双腿直到感觉麻木会导致永久性的神经损伤。由此可知，根据Richard Graves的说法，反复跷二郎腿最终可能会损伤你的腿部神经。故选C。

4.

推理判断题。根据最后一段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.可知所以下次你坐下的时候，试着让自己养成双脚着地坐着的习惯。它不仅有助于你的姿势和稳定性，而且从长远来看还能拯救你的健康。结合文章说明了虽然跷二郎腿坐着很舒服，但这可能会导致你没有意识到的健康问题。有研究表明，跷二郞腿坐着会增加血压，并说明了这一动作是如何导致血压升高并导致长期健康问题的。也有医学专家指出，反复跷二郎腿最终可能会损伤你的腿部神经。所以建议试着让自己养成双脚着地坐着的习惯。由此可推知，这篇文章的主要目的是提供建议。故选B。