下列哪项不是遗传性乳光牙本质的病理改变()
A.牙本质小管数目减少
B.牙本质中出现血管组织
C.釉牙本质界呈直线
D.牙釉质钙化不全
E.牙髓呈急性炎症反应
参考答案:E
How can a country where teachers devote all their class hours to training students to take exams _____ to compete in the technology race with other countries.
A.being expect
B.expecting
C.expected
D.be expected
扁桃体组织中存在的免疫球蛋白最多为()。
A.IgA
B.IgG
C.IgM
D.IgD
E.IgE