[解析]
(1)D 细节题.根据文章内容,The reason this happens is because the blood in your legs has to work against gravity to be pumped back to your heart,crossing one leg over the other increases resistance,making it even harder for the blood to circulate.发生这种情况的原因是血液在你的腿被输送回回心脏穿越另一条腿时,阻力增加,使血液流通变得更加困难,结合选项,故选D
(2)B 细节题.根据文章内容,but if you sit for long periods of time it's important that you take note of how long you have your legs crossed for.但是如果你坐了很长时间,很重要的一点是你要注意你的腿交叉了多长时间故选B
(3)A 理解推断题.根据文章内容,You also might notice that when you sit with your legs crossed for long periods of time your feet and legs get tingly or have the feeling of being asleep.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结合选项,当你与你的双腿交叉坐很长一段时间,你的脚和腿有刺痛感的或者困倦.不适的感觉的感觉可能只持续一两分钟,直到觉得麻木,造成永久性神经损伤,因此BCD正确,A未提及,故选A