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男性，60岁，咳嗽、咯血、体重减轻两个月。吸烟40年，每天1包。入院查CT、MIR示右下肺癌，拟行右下肺叶切除术。

患者如期手术，麻醉行双腔气管插管，下列哪些是单肺通气的绝对适应证（）。

A.肺脓肿，脓液量超过50ml

B.肺泡蛋白沉积症

C.大咯血

D.食管癌切除

E.肺叶切除

答案

参考答案：A, B, C

单项选择题

胃火亢盛者可见下列哪种饮食异常（）

A.食少纳呆，腹胀便搪

B.多食易饥，口渴心烦

C.纳呆脘闷，头身重困

D.饥不欲食，胃中嘈杂

E.纳呆厌食，暖气酸腐
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单项选择题

An analog signal’s characteristic quantity representing data may (66) . at any instant, any value within a continuous (67) . For example, an analog signal may follow continuously the values of another physical quantity representing data.

A discrete signal is composed of (68) elements in time, each element having one or more characteristic quantities which can represent data. Examples of characteristic quantities are amplitude, waveform, (69) , and position in time. A digital signal is a special case of discrete signals, in which data are represented by a (70) number of well-defined discrete values that one of its characteristic quantities may take in time.

（68）处填（）。

A．sequent

B．contiguous

C．following

D．successive
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