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单选题
难度系数:

1.

如图,矩形ABCD的边长AB=6,BC=8,将矩形折叠,使点C与点A重合,则折痕EF长为(    )。




A:

3

B:

C:

4

D:

  • 提示1PHA+6L+e57uTQUbvvIzmoLnmja7mipjlj6DnmoTmgKfotKjlvpfliLBFRuWeguebtOW5s+WIhkFD77yM5Y2zT0E9T0PvvIziiKBBT0Y9OTDCsO+8jOWImUZBPUZD77yM6K6+QUY9eO+8jOWImUZDPXjvvIxCRj1CQy14PTgteO+8jOWcqFJ04pazQUJG5Lit5qC55o2u5Yu+6IKh5a6a55CG5Y+v6K6h566X5Ye6eO+8jOWcqFJ04pazQUJD5Lit5qC55o2u5Yu+6IKh5a6a55CG5Y+v6K6h566X5Ye6QUM9MTDvvIzliJlPQT0177yM5ZyoUnTilrNBT0bkuK3liKnnlKjli77ogqHlrprnkIblj6/orqHnrpflh7pPRu+8m+aYk+ivgeW+l+KWs0FPReKJjOKWs0NPRu+8jOW+l+WIsE9FPU9G77yM5YiZRUY9Mk9GLjwvcD4=