呼吸衰竭最主要的临床表现是（）
A.呼吸困难与发绀
B.呼吸频率增快
C.呼吸费力伴呼气延长
D.神经精神症状
E.双肺有大量湿啰音
参考答案：A
Be careful that a good name of a product doesn’t _______ mean good quality of it.
A．alternatively
B．approximately
C．obviously
D．necessarily
