下颌中切牙缺失,可选择的修复方案有
A.双端固定桥
B.粘结桥
C.活动义齿
D.种植义齿
E.以上均正确
参考答案:E
从大额支付系统来看,电子商业汇票系统是()。
A.无户特许参与者
B.有户特许参与者
C.城市处理中心节点
D.间接参与者
I want to use the same tools _______used in your factory a few days ago.
A.as was
B.which was
C.as were
D.which