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问题 单项选择题

周围性发绀，毛细血管血液中还原血红蛋白量的临界值为（）

A．呼吸停止

B．Cheyne-Stokes呼吸

C．Kussmaul呼吸

D．抑制性呼吸

E．叹息样呼吸

答案

参考答案：E

单项选择题

高压验电器的发光电压不应高于额定电压的（）%。

A、50

B、25

C、75
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单项选择题

What can be inferred about old nepotism

A．Parents maximized the family advantages for the benefits of their children.

B．Parents gave full respect to the likes and dislikes of their children.

C．Children had their own choice of career and marriage.

D．Children willingly lived on the expectations of their families.
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