下列哪一项不属于成人牙周炎的特征性改变
A．牙齿移位
B．牙周袋形成
C．牙龈炎症
D．牙槽骨吸收
E．牙齿松动
参考答案：A
__________, it wont’ be the only factor concerning your happiness.
A. As the result of the exam might be important
B. As important the result of the exam might be
C Important as might the result of the exam be
D. Important as the result of the exam might be
行政事业收费项目（）。
A.可由县人民政府根据农村具体情况确立
B.可以强制执行
C.必须由中央和省两级制定，省级以下无权制定项目
D.是农民合同内的负担，应该积极缴纳
