呼吸过程中的有效通气量是（）
A．肺活量
B．潮气量
C．补吸气量
D．补呼气量
E．肺泡通气量
参考答案：E
解析：
动物每次吸入的气体，一部分停留在呼吸性细支气管以上部位的呼吸道内，这部分气体不能参与肺泡间的气体交换，称为解剖无效腔或死腔。由于无效腔的存在，每次吸入的新鲜空气，一部分停留在无效腔内，另一部分进入肺泡，只有进入肺泡的气体才能实现气体交换。因此肺泡通气量才是呼吸过程中的有效通气量。
| 阅读理解。 |
| Mrs. Green has a young dog which is very clever. It often helps her buy a newspaper (报纸). One winter evening, the dog goes out to play. It is snowing heavily. Soon the ground becomes white. "The dog never (从未) loses his way. Where is he now?" Mrs. Green thinks. She shouts his name. But still the dog doesn't come back. So she telephones the police and tells them a lot about her dog. "My dog is very clever. He always goes out and comes back soon. Sometimes he plays with his friends, Mickey. He can buy a newspaper. He almost (几乎) talks." The policeman is tired and says, "I think you'd better put your telephone down. Maybe he is trying to telephone you now." |
| 1. The story happens (发生) . |
[ ] |
| A. in summer B. in winter C. in autumn D. in spring |
| 2. The ground becomes white because . |
[ ] |
| A. some painted white B. There are some paper on it C. it is snowing heavily D. it is really very clean |
| 3. The dog doesn't come back because . |
[ ] |
| A. it loses its way B. someone buys it C. it is too clever D. it goes to the police |
| 4. When Mrs. Green tells the police,"He almost talks." She meant (意思是) that . |
[ ] |
| A. his dog was silly (笨的) B. The dog is good at talking C. the dog is as clever as a man D. the dog someimes talks |
| 5. From what the policeman says "I think you'd better put your telephone down. Maybe he is trying to telephone you now." Who do you think "he" means (意思是)? |
[ ] |
| A. Mrs. Green's husband. B. The thief who took the dog away. C. The lost dog. D. The policeman. |