如图,A,E是半圆周上的两个三等分点,直径BC=4,AD⊥BC,垂足为D,BE与 发布时间:2017-04-21 04:02 │ 来源:www.tikuol.com 题型:填空题 问题: 如图,A,E是半圆周上的两个三等分点,直径BC=4,AD⊥BC,垂足为D,BE与AD相交于点F,则AF的长为________.
题型:填空题 ---Someone is knocking at the door. Who may it be? ---It ______ be Tom. He is still in the school.A.can’tB.mustn’tC.couldn’tD.may not 查看答案