.

I soon found that the work I was doing had already been done by someone else - ________, I was wasting my time.

A．in a word

B．in all

C．in other words

D．in words

下列为正常人出现支气管肺泡呼吸音的常见部位，但哪一项应除外

A．胸骨左侧第1、2肋间隙

B．胸骨右侧第1、2肋间隙

C．背部第6、7颈椎水平

D．肩胛间区第3、4胸椎水平

E．右肺尖