嵌顿性疝与绞窄性疝手术的主要关键在于正确判断疝内容物的生命力。
参考答案:对
---Why is the librarian looking so hard at me?
---You _______ to read aloud in the reading room.
A.don't suppose
B.haven't supposed
C.are not supposing
D.are not supposed
Some goods are missing()terrible weather.
A.due
B.because of
C.because
D.since