问题
单项选择题
有关牙周组织病的概念以下哪项是错误的（）
A.牙周组织病是牙龈，牙周膜，牙骨质，牙槽骨慢性炎症性疾病
B.牙周炎一旦患病总是呈持续性破坏过程
C.疾病的进展常呈活跃期和静止期交替出现
D.不同个体对牙周致病因素的敏感度不同
E.菌斑，牙石与牙周组织病关系十分密切
答案
参考答案：B
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有关牙周组织病的概念以下哪项是错误的（）
A.牙周组织病是牙龈，牙周膜，牙骨质，牙槽骨慢性炎症性疾病
B.牙周炎一旦患病总是呈持续性破坏过程
C.疾病的进展常呈活跃期和静止期交替出现
D.不同个体对牙周致病因素的敏感度不同
E.菌斑，牙石与牙周组织病关系十分密切
参考答案：B
| 阅读理解。 | |
| We may know some good health habits, but we don't realize how much difference they can make. In the 1970s, scientists at the University of California-Los Angeles asked 7,000 people about their health habits. Then they followed these people to see how long they lived. The scientists discovered that seven habits were closely linked with a longer life.
three or fewer of these habits lived another 21.6 years. People who had six or seven could expect to live another 33 years! But how do you change your habits? Make one small change every week. And be patient. It takes about 21 days to form a new habit. | |
| 1. The underlined word "they" (Paragraph 1)most probably refers to . | |
[ ] | |
| A. scientists B. good habits C. universities D. 7,000 people | |
| 2. One of the habits closely linked with a longer life is . | |
[ ] | |
| A. taking regular exercise B. drinking less water every day C. eating cakes between meals D. sleeping more than eight hours every night | |
| 3. The idea "these habits had a powerful effect on health" is supported with . | |
[ ] | |
| A. guesses B. stories C. experiences D. facts | |
| 4. In which page of a newspaper can you most probably read this passage? | |
[ ] | |
| A. News B. Health C. Business D. Sports | |
| 5. The passage is written mainly to tell people . | |
[ ] | |
| A. to keep a good weight B. to avoid eating to much C. to form good health habits D. to keep away from danger |