在骨折急救中，开放性外露的骨折断端均应立即复位。请判断是对是错?

手术时无菌操作时，穿无菌手术衣后，手术者双手可交叉置于腋下。请判断是对是错? 点击查看答案&解析

Many parents try hard to protect their kids from TV and Internet advertising. But how can you protect a child form. a large fast-food ad painted on her school locker(小柜)? Or a toy ad on the side of his school bus? 点击查看答案