咬合创伤时X线片上常表现为A.牙槽骨水平吸收 B.牙槽骨密度普遍减低 C.牙槽骨无吸 发布时间:2017-05-25 01:14 │ 来源:www.tikuol.com 题型:单项选择题 问题: 咬合创伤时X线片上常表现为A.牙槽骨水平吸收B.牙槽骨密度普遍减低C.牙槽骨无吸收D.骨小梁普遍模糊E.牙周膜间隙增宽
题型:单项选择题 We _____ London on 15 July, and we'll be taking a flight to Morocco, in northern Africa.[ ]A. are going toB. leaveC. have leftD. have been leaving 查看答案
题型:单项选择题 埋地阀门的运行、维护应符合()规定。A、应定期检查阀门,应无燃气泄漏、损坏等现象,阀井应无积水、塌陷,无妨碍阀门操作的堆积物等B、阀门应定期进行启闭操作和维护保养C、定期关闭阀门检修D、无法启闭或关闭不严的阀门,应及时维修或更换E、阀门每半年送检一次,并做好相应记录 查看答案