说出肺活量的概念及正常值。
（1）概念：尽力 后再尽力呼出的 。反映肺在一次 中最大的通气能力。
（2）影响因素： 、性别、 、健康状况等。
（3）正常值：成年人肺活量大约是 mL。
思考
在很多的测量过程中，我们会取测量数值的平均值作为最后结果。为什么在测量肺活量时，要取最大值作为被测者的肺活量呢？
（1）吸气；气体量；呼吸运动
（2）年龄；身材
（3）2；500~4 000
思考：肺活量反映肺在一次呼吸运动中最大的通气能力。
| 用方框中所给单词或短语的适当形式完成下列句子。 | |
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| 1. The man is sitting in the hall, ___________ his wife. 2. Could you please ___________ here? I don't like this smell. 3. It ___________ since last night. 4. Would you mind ___________ the door for me? 5. Liu Ying plays ping-pong as ___________ as Liu Li. 6. There is little milk in the bottle, ___________? 7. Listen! Can you hear a baby ___________ in the next door? 8. In the past, newspapers ___________ it easy for people to get information, but now it is changing. 9. There is a beautiful clock on the wall, ___________? 10. Li Lei ___________ English for 5 years. |