题目

Do let your mother know all the truth. She appears ________ everything. A . to tell B . to be told C . to be telling D . to have been told 答案：D如图，数轴上有A、B、C、D四个整数点（即各点均表示整数），且3AB=BC=2CD．若A、D两点所表示的数分别是﹣6和5，则线段AC的中点所表示的数是（　　）A. ﹣3 B. ﹣1 C. 3 D. ﹣2