解答:解:因?yàn)?span id="yqs8uma" class="MathJye" mathtag="math" style="whiteSpace:nowrap;wordSpacing:normal;wordWrap:normal">
=
,
所以AD=BC,
A、因?yàn)?span id="ea0swew" class="MathJye" mathtag="math" style="whiteSpace:nowrap;wordSpacing:normal;wordWrap:normal">
=
,
所以AD=BC;
B、因?yàn)?span id="eycceui" class="MathJye" mathtag="math" style="whiteSpace:nowrap;wordSpacing:normal;wordWrap:normal">
=
,
所以AB=DC,
C、因?yàn)?span id="ymkkky6" class="MathJye" mathtag="math" style="whiteSpace:nowrap;wordSpacing:normal;wordWrap:normal">
=
,
所以AB=CD,
D、因?yàn)?span id="m4ck0qe" class="MathJye" mathtag="math" style="whiteSpace:nowrap;wordSpacing:normal;wordWrap:normal">
=
,
所以AC=BD,
故選:A.