浙江杭州2019届上学期高三英语模拟卷二第I卷第一部分 听力（共两节，满分30分）（略）第二部分 阅读理解（共两节，满分35分）第一节 （共10小题；每小题2.5分，满分25分）阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题纸上将该选项涂黑。A A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. 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. Crossing your legs can also lead to neck and back pain. Ideally, its best for our bodies to sit with our feet planted flat, hip width apart, on the floor, but its not easy to maintain perfect posture all day at the office. When you sit with your legs crossed your hips are in a twisted position, which can cause one of your pelvic(骨盆) bones to rotate. Since your pelvic bone supports your neck and spine, this can cause pressure on your lower and middle back and neck. 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. This is because when one leg sits on top of the other it causes pressure on the veins and nerves in your legs and feet, leading to numbness and/or temporary paralysis(瘫痪) in the legs, ankles, or feet. 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.21. What is the main purpose of the passage?A. To warn us against the negative effects of crossing legsB. To advocate a healthier way of livingC. To help correct our postureD. To present the possible dangers of sitting with legs crossed22. It is advisable not to sit with our legs crossed for long in that _.A. it might lead to high blood pressureB. it might do damage to our nervesC. it might cause our bones to rotate D. it might cause paralysis 23. Which of the following shows the structure of the whole text? BMicrosoft has developed a new smartphone app that interprets eye signals and translates them into letters, allowing people with motor neurone disease to communicate with others from a phone.The GazeSpeak app combines a smartphones camera with artificial intelligence to recognize eye movements in real time and convert them into letters, words and sentences.For people suffering from ALS（渐冻症）, also known as motor neurone disease, eye movement can be the only way they are able to communicate.“Current eye-tracking input systems for people with ALS or other motor impairments are expensive, not robust under sunlight, and require frequent re-calibration and substantial, relatively immobile setups,” said Xiaoyi Zhang, a researcher at Microsoft who developed the technology.“To mitigate the drawbacksWe created GazeSpeak, an eye-gesture communication system that runs on a smartphone, and is designed to be low-cost, robust, portable and easy to learn.”The app is used by the listener by pointing their smartphone at the speaker. A chart that can be stuck to the back of the smartphone is then used by the speaker to determine which eye movements to make in order to communicate.The sticker shows four grids of letters, which each correspond to a different eye movement. By looking up, down, left or right, the speaker selects which grids the letters they want belong to. The artificial intelligence algorithm is then able to predict the word or sentence they are trying to say. Zhangs research, Smartphone-Based Gaze Gesture Communication for People with Motor Disabilities, is set to be presented at the Conference on Human Factors in Computing Systems in May.4. How does the GazeSpeak app help ALS suffers speak with their eyes and communicate with others?A. It combines a smartphones camera with artificial intelligence to recognize eye movements in real time.B. It performs frequent re-calibration and substantial, relatively immobile setups.C. It interprets eye signals and translates them into letters.D. It is designed as a low-cost, robust, portable and easy to learn system.5. What does “they” in the seventh paragraph refer to?A. grids B. speakers C. letters D. movements6. What can be inferred from the passage?A. For people suffering from ALS, eye movement can be the only way they are able to communicate.B. Current eye-tracking input systems are expensive, but robust under sunlight.C. The chart stuck to the back of the smartphone is the key to helping ALS suffers.D. Xiaoyi Zhangs research has not been presented yet.COn the day the tornado hit, there was no indication severe weather was on its waythe sky was blue and the sun had been out. The fi