This book is said to be a special one, which______ many events that cannot be found in other history books.

A．reads

B．writes

C．covers

D．prints

腹平片上区别大小肠最可靠的特征是（）

A.结肠袋影

B.环形皱襞影

C.肠襻数目

D.肠襻分布

E.粪便块影