嵌顿疝与绞窄性鉴别要点是()
A.疝块不能回纳
B.疝块是否有压痛
C.绞窄疝出现呕吐
D.绞窄疝出现休克
E.绞窄疝内容发生血循环障碍
参考答案:E
Harry Potter has even become part of the school curriculum, much ____ the pleasure of the schoolchildren.
A.to
B.beyond
C.over
D.by
当天然气的浓度大于爆炸极限的上限时,遇明火会()。