便利店销售中，依托油品客户，积极开展（），开发大宗商品团购。
A、优质服务
B、油非互动
C、促销活动
D、降价销售
参考答案：B
The pilot of a small aircraft with a 40-gallon fuel tank wants to fly to Cleveland, which is 480 miles away. The pilot recognizes that the current engine, which can fly only 8 miles per gallon, will not get him there. By how many miles per gallon must the aircraft’s fuel efficiency be improved to make the flight to Cleveland possible ？（）
A. 2
B. 4
C. 12
D. 40
E. 160
急性肺水肿（）
A.多需采用PEEP通气
B.饱胃患者
C.使用扩血管药
D.禁忌单独使用吗啡
E.慎用PEEP通气
