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Physical exercise can improve lung capacity, it is because exercise can make

white and cold autumn2010-02-19 19:10:19 +0000 #1
A, respiratory rate to speed up

B, alveolar volume increased

C, respiratory muscle strength increased

D, increase in the number of alveolar
3784242102010-02-19 19:20:55 +0000 #2
c
Yan Wood2010-02-19 19:26:28 +0000 #3
answer good

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