影响牙周炎患牙松动度的主要因素是()。
A.牙根的数目
B.牙根的形态
C.牙槽骨吸收的程度
D.邻牙存留情况
E.创伤
参考答案:C
What China can learn from 2008 financial storm has become hot topic among
us. [ ]
A. the; /
B. the; a
C./; the
D./; a
10.54读作( ),7厘米写成小数是( )米。