医院的医疗器械的电气设备可选用动作电流为()以内动作的漏电保护器。
A、30mA,0.1S
B、15mA,0.1S
C、6mA,0.1S
D、50mA,0.1S
参考答案:C
—Why don’t you like winter in Beijing?
—Because it is winter in Guangzhou.
A.as cold as
B.much colder than
C.not so cold as
D.not colder than
下列哪项不需要使用全胃肠外营养()。
A.短肠综合征
B.溃疡性结肠炎长期腹泻
C.胆囊造瘘术后
D.坏死性胰腺炎
E.癌肿化疗致严重呕吐