引起急性化脓性腹膜炎最常见的原因是()
A.胃、十二指肠溃疡穿孔
B.急性胆囊炎穿孔
C.绞窄性肠梗阻
D.肝、脾破裂
E.阑尾坏疽穿孔
参考答案:E
As is known to all language learners, the newly learnt words will soon be forgotten unless they are _______ used in everyday communication.
A.gradually
B.sincerely
C.hopefully
D.frequently
内格里小体为__________,最常见于___________和_____________细胞中。