题目

To our          ,Mr. Brown didn’t take part in our New Year’s party. How we wish he could have!   A. Joy             B. disappointment     C.  Surprise          D. happiness 答案:B如图,在矩形ABCD中,点E,F分别在边AD,BC上,BE⊥EF,AB=6cm,AD=11cm(其中AE>DE),DF=4cm,求BE的长.
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