单项选择题
We are looking forward to receiving your cable extension of the above L/C thus enabling us to effect shipment of the goods A．out of question B．in question C．in the question D．out of the question
未知题型 风湿性心瓣膜病左房室瓣狭窄最重要的体征是A.二尖瓣面容B.肺动脉瓣区第二心音亢进###SX
未知题型 企业营业利润与业务收入(销售收入)的比率是指( )。
单项选择题 休克患者血压常不稳定，刚用升压药或更换升压药时，测血压时间间隔为( ) A．5～10min B．10～15min C．15～20min D．20～25min E．25min以上
