关于双臂卡环的结构和应用,下述哪项是错误的 ()
A.无牙合支托
B.有牙合支托
C.有颊、舌臂
D.用于基牙咬合过紧
E.用基牙松动
参考答案:B
解析:双臂卡无牙合支托。
在△ABC和△DEF中,∠A=∠D=90°,则下列条件中不能判定△ABC和△DEF全等的是( )
A.AB=DE,AC=DF
B.AC=EF,BC=DF
C.AB=DE,BC=EF
D.∠C=∠F,BC=EF
The result of the study indicated that it was the type of fat ______ made the difference.
A.that
B.what
C.who
D.as