问题
单项选择题
血液中CO2浓度对呼吸的调节主要通过（）。
A.刺激延髓腹外侧浅表部位
B.直接刺激呼吸中枢
C.刺激脑桥调整中枢
D.牵张反射
答案
参考答案：A
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血液中CO2浓度对呼吸的调节主要通过（）。
A.刺激延髓腹外侧浅表部位
B.直接刺激呼吸中枢
C.刺激脑桥调整中枢
D.牵张反射
参考答案：A
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| I work in a small shop. It's near an English 1 . Every day, students come to 2 things. In the morning, I get up 3 six and then have breakfast. I go to 4 by bike. I 5 to the shop at about six forty. The shop 6 at seven. We sell things 7 food and drinks. We have school things, too. So there 8 often many people in our shop 9 morning till night. I have 10 in the shop. At seven in the evening the shop is closed. | ||||
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