急性结膜炎的传染方式A．接触传染 B．消化道传染 C．飞沫传染_爱下问搜题

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问题单项选择题

急性结膜炎的传染方式

A．接触传染

B．消化道传染

C．飞沫传染

D．血液传染

E．汗液传染

答案

参考答案：A

单项选择题

Paul is standing 180 yards due north of point P, Franny is standing 240 yards due west of point P. What is the shortest distance between Franny and Paul ？（）

A.60yards

B.300yards

C.420yards

D.900yards

E.9，000yards

单项选择题

使有氧代谢不能正常进行，生命难以维持的PaO₂是在（）

A.60mmHg

B.50mmHg

C.40mmHg

D.30mmHg

E.20mmHg