鉴别Cushing综合征与肥胖症，较好的指标是（）
A.血浆皮质醇浓度
B.血浆.ACTH水平
C.血糖
D.尿游离皮质醇
E.尿17-羟
参考答案：D
干粉灭火器主要适用于扑救易燃液体，可燃气体和电气设备的（）火灾。
The soldiers are afraid that they will soon __________ oil and food if they are still surrounded.[ ]
A．run out
B．run out of
C．run across
D．run away with
