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
An analyst does research about yield spread. All other factors being equal, will the yield spread for an option-free corporate bond over the benchmark bond most likely decrease:()
A.A
B.B
C.C
有整合营销传播先驱之称的是( )。
A.帕累托 B.卡斯特C.麦格雷戈 D.舒尔茨