男,45岁,全冠修复,边缘密合,无悬突,戴用3周后,出现牙龈炎,病因是()
A.接触点过紧
B.接触点过松
C.咬过高
D.颊面凸度过大
E.颊面凸度过小
参考答案:B, D, E
— I think students should have mobile phones to call their parents at school..
—_______. They often use them to play games instead.
A.I hope so
B.I don't agree
C.No problem
D.Good idea
根据美国AIA标准合同文件,CM合同中与雇主订立合同的当事人是()。
A.建筑师
B.专业咨询机构
C.施工承包商
D.承担分包工作的分包商