库氏呼吸的发生机制是A．缺氧致呼吸中枢兴奋性增高 B．氧化碳潴

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问题单项选择题

库氏呼吸的发生机制是

A．缺氧致呼吸中枢兴奋性增高

B．氧化碳潴留抑制呼吸中枢

C．酸中毒抑制呼吸中枢

D．中氢离子增高刺激呼吸中枢

E．颅内压增高兴奋呼吸中枢

答案

参考答案：D

选择题

--- ________ people are taking action to protect the environment now.

--- Yes. ________ of my classmates come to school by bike now.

A．Less and less; Five eighths

B．Less and less; Five eighth

C．More and more; Five eighth

D．More and more; Five eighths

单项选择题

信贷客户的信贷动机可以概括为()。

A．主观动机和客观动机

B．预防性动机和应对性动机

C．理性动机和感性动机

D．交易性动机和投机性动机