金黄色葡萄球菌肺炎
A．粉红色泡沫样痰B．脓血痰C．砖红色胶冻样痰D．铁锈色痰E．脓臭痰
参考答案：B
Make sure that the lighting is _____ so that we can see all things clearly.[ ]
A. desperate
B. urgent
C. adequate
D. extreme
什么叫过电压？过电压有哪些类型？各是怎样产生的？
