经过点(0,2)且与坐标轴围成的三角形面积为4的直线解析式是( )。
一May I have a glass of beer.please?
一Beer?Sorry,there is left,but would you mind having,some juice instead?
A none B.no one C nothing D few
胃十二指肠溃疡急性穿孔最重要的诊断依据是______
A.上腹部刀割样剧痛B.肝浊音界缩小C.X线检查可见膈下游离气体D.腹式呼吸音减弱E.板状腹