影响牙槽嵴吸收速率的局部因素是()
A.失牙原因
B.失牙时间
C.局部骨质密度
D.是否经过牙槽嵴修整
E.以上都是
参考答案:E
下列命令中,哪个命令能为远程对象生成stub和skeleton
A.rmic
B.rmiregistry
C.rmid
D.serialver
Helen always helps her mother even though going to school ______ most of her day.
A.takes up
B.makes up
C.saves up
D.puts up