题目

将酶、抗体、核酸等生物大分子或小分子药物用磷脂制成的微球体包裹后吞服，更容易被人体细胞吸收。这是因为 A．生物膜具有选择透过性，能够允许对细胞有益的物质进入 B．生物膜的主要成分是磷脂，且具有流动性 C．生物膜上的糖蛋白起识别作用 D．生物膜具有半透性，不允许大分子物质通过 答案：BIt is said that more than four million people die each year from smoking. That number is ncreasing. Seven in ten of those deaths are in developing countries. These numbers are frightening.     Yet people around the world continue to smoke. In the United States, about forty-seven million adults smoke. This year, more than 430,000 Americans died of diseases which have something to do with smoking. The American Cancer Society says smoking harms the body greatly. It warns that smoking even a small number of cigarettes is dangerous.     It is not easy to give up smoking. However, doctors say you probably will live longer if you do stop smoking. You will feel better and look better. You also will protect the health of family members who breathe your smoke.     The American Cancer Society says there is not one right way to stop smoking. They say any way that helps is worth trying. People can take long walks or spend time in places where smoking is not allowed. Also, they can eat a small piece of fruit or vegetable when they want to have a cigarette. The American Cancer Society says the sooner smokers stop smoking, the more they will reduce their chances of getting cancer and other diseases.     Stop smoking before smoking stops you! 1. About           people in the US this year died of diseases that have something to do with smoking.      A. 4,000,000          B. 1,700,000            C. 47,000,000          D. 430,000 2. If a person smokes，         .      A. he will die of cancer      B. he will protect the health of family members      C. he will join the Cancer Society      D. he will increases his chances to get cancer and other diseases 3. According to the passage, one way to stop smoking is          .      A. to eat less fruit and vegetables      B. to take long walks or stay in places where smoking is not allowed      C. to eat a small piece of fruit or vegetables when smoking a cigarette      D. to make more friends and spend time with them 4. The word "reduce" means          in Chinese.      A.增加                       B. 获得                       C.减少                        D.诱发 5. Which of the following is true?     A. About 2,800,000 people die each year from smoking in developing countries.     B. People are frightened and they have all stopped smoking.     C. It's safe to smoke only a few cigarettes. D. People are sure to live longer if they give up smoking.