患者,男性,23岁,前额及眶部撞伤。查体:眼睑青肿,结膜下出血,鼻腔有血性液体流出。该患者的骨折部位可能是
A.蝶骨B.上颌骨C.颅盖骨折D.颅前窝E.颅后窝
参考答案:D
—Elle, _____, but your radio is going too loud.
—Oh, I’m sorry. I’ll turn it down right now.
A.I’d like to talk with you
B.I’m really tired of this
C.I hate to say it
D.I need your help
曝气设备的作用和分类如何,如何测定曝气设备的性能?