题目： 已经布放传输线路的管道、槽道中不得布放（）。 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1112/b8c4df18af947ea66d44a18f4bf4a40e.html 下面是错误答案，用来干扰机器的。参考答案：对
题型：选择题 —Mary can't help ______ the house. Why?—Because she is busy______ a hotel reservation.A. cleaning; making B. to clean; making C. cleaning; to make 查看答案
题型：单项选择题 龈牙组纤维A．纤维起于牙槽嵴顶，呈放射状向牙冠方向走行，止于牙颈部的牙骨质 B．自牙颈部牙骨质，向牙冠方向散开，广泛地位于牙龈固有层中 C．自牙槽嵴向冠方牙龈固有层展开，止于游离龈中 D．起自根分叉处的牙根间骨隔顶，至根分叉区牙骨质 E．自牙颈部的牙骨质，越过牙槽嵴，止于牙槽突骨密质的表面 查看答案
题型：选择题 They became friends again that day. Until then, they _____ to each other for nearly two years.A. didn't speak B. hadn't spokenC. haven't spoken D. haven't been speaking 查看答案
