以下是固定桥禁忌证的是()。
A.缺失侧基牙有慢性根尖周炎
B.缺失侧基牙有Ⅰ度松动
C.临床牙冠短,髓腔较大,髓角高
D.缺失牙超过3个以上
E.以上均不是
参考答案:C
The little boy was ______ with the big boy because he was dirty words to him. [ ]
A. fond, speaking
B. angry, saying
C. angry, talking
D. friendly, telling
摩擦可以使物体(),这是由于在摩擦过程中物体失去或得到部分()的缘故。