固定桥粘固后短期内出现咬合疼痛,最可能的原因是
A.牙龈炎
B.牙髓充血
C.咬合早接触
D.固位体边缘过长
E.根尖周炎
参考答案:C
People in London have _______ between lunch and supper.
A.brunch
B.breakfast
C.dinner
D.afternoon tea
计算题:某物体做功为2.1×J,问该功相当于多少KWh?