屏蔽效能SE
参考答案:SE=-20lgT(dB.,表征了屏蔽体对电磁波的衰减程度,越大越好。
小题1:My mother asked me to buy two __________on my way back home. (tomato)
小题2:The family are having a party to celebrate their child’s _________ birthday.(five)
小题3:Please help ___________ to the fruit on the plate, children. (you)
小题4:Peter felt ___________ sick yesterday so he asked for leave. (terrible)
小题5:We are sorry to hear the bad news of the ____________ MH 370 on TV. (fly)
小题6:How I wish the heavy haze(雾霾)could ___________ in our city. (appear)
小题7: The government in Fengxian is planning to __________the roads to solve the heavy traffic. (wide)
小题8:US First lady Michelle Obama gave a_________ at Peking University and met with Chinese and US students in March. (speak)
5岁男孩,出现胸部出现凹陷畸形6月。查体:颈前屈,胸骨凹陷,肩前倾,轻度驼背,腹部凸出,诊断可能为()
A.胸壁肿瘤
B.维生素D缺乏
C.鸡胸
D.漏斗胸
E.胸壁结核