患者女性,垫枕右侧卧位,左侧肩胛角尖端可叩得一相对浊音区,撤去枕头浊音区消失,此浊音是由于
A.左肺炎B.左肺脓肿C.脊柱弯曲D.空洞型肺结核E.肺梗死
参考答案:C
—You bought _____house?
—No. I always had _____ idea, but the price has gone up.[ ]
A.the ; the
B. a ; an
C. the ; an
D. a ; the
简述电安全使用准则。