已知:如图,在中,是边上的一点,是的中点,过点作 的平行线AF与的延长线交于点,且,连结.1.(1)求证:是的中点;2.(2)如果,试判断四边形的形状,并证明你的结论. 答案: 1.(1):∵E是AD的中点 ∴AE=DE 又∵AF∥BC ∴ ∠AFE=∠EBD 又∵∠AEF=∠DEB ∴△AEF≌△DEB(AAS) ……………………………………3分 ∴AF=BD 又∵AF∥DC,AF=DC ∴
There, ______ the corner of his study, stood the bookcase ______ a lot of books in it.
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A. at…with
B. at…that
has
C. in…that has D. in…with