搭设或拆除跨越架应设()
A.专责监护人
B.工作许可人
C.工作票签发人
D.操作人
参考答案:A
读短文,回答问题。
I have a new teacher. Her name is Lily. She is from Canada. She's a university student. She is tall and thin.
She is active and smart. I like her very much.
1. Do you have a new teacher?
2. Where is she from?
3. What's she like?
4. Is she active?
下列哪种情况下可以做塑料全冠()
A.备牙后的临时冠
B.诊断性暂时修复
C.修复前牙过小牙
D.咬合紧的后牙
E.咬合紧的前牙