成年人上颌尖牙单个缺失后,通常首选的修复方式是()
A.种植义齿修复
B.活动义齿修复
C.粘接桥修复
D.双端固定桥修复
参考答案:A
The () is a collection of modules serving as interface between hardware and software to provide a software platform.
A.computer
B.processor
C.application software
D.operating system
某公司拥有长期投资资金500万元,其中,债券投资资金200万元,资金成本为5%;股票投资300万元,资金成本为12%。则该公司加权平均资金成本为( )。
A.8.9%
B.9.2%
C.9.8%
D.17%