问题
问答题 简答题
参与呼吸的肌有哪些？各有什么作用？
答案
参考答案：
呼吸肌主要包括有肋间外肌、肋间内肌和膈。其中肋间外肌可提肋助吸气，肋间内肌可降肋助呼气。膈是最重要的呼吸肌，收缩时膈穹窿下降，增大胸腔容积助吸气；松弛时膈穹窿上升，恢复原位，胸腔容积减小可助呼气。
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参与呼吸的肌有哪些？各有什么作用？
参考答案：
呼吸肌主要包括有肋间外肌、肋间内肌和膈。其中肋间外肌可提肋助吸气，肋间内肌可降肋助呼气。膈是最重要的呼吸肌，收缩时膈穹窿下降，增大胸腔容积助吸气；松弛时膈穹窿上升，恢复原位，胸腔容积减小可助呼气。
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| Don't Let the Candle Off A man had a little daughter-an only and much-loved child. He lived for her-she was his whole 1 . He was so happy to hear his girl's voice that he hardly 2 what he would do 3 her. But unfortunately one day, his daughter became seriously ill. He was very 4 . He tried all he could to 5 her. At last, his 6 proved useless and the child passed away. The father became a bitter recluse (隐士) after that, 7 himself away from his friends and refusing every activity that might 8 him back to his normal self. But one night he had a dream. He was in heaven, seeing a group of little child angels. They were dressed in white and 9 in a line passing by the Great White Throne. Every angel 10 a candle. He noticed that all the candles were bright except one. Then he found that the child with the 11 candle was his own little daughter. 12 to her, he held her in his 13 , hugged her gently, and then asked, "Why is it, darling, that your candle 14 is unlighted?" His daughter said, "Daddy, they often relight it, but your 15 always put it out." Just then he 16 . The lesson was very clear, and its 17 were immediate. From that hour on he was not a recluse, but socialized (交际)freely and 18 with his former friends and colleagues. No longer would his darling's candle be put out by his 19 tears. We can't avoid having a sad 20 during lifetime, but we should remember not to let our beloved person's candle off. | ||||
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