前牙深覆盖是指正中位时上切牙切端至下切牙唇面的最大水平距离超过()
A.2mm
B.3mm
C.4mm
D.5mm
E.6mm
参考答案:B
根据对话内容,在空缺处填上适当的单词。
Danny: Hello! Is that Jenny?
Jenny: Yes. 1. is Jenny speaking. Who's that?
Danny: Danny is 2. . May I ask you a funny question?
Jenny: Yes, you may. 3. is it?
Danny: What does the big chimney (烟囱) say to the little chimney?
Jenny: Sorry. I don't 4. .
Danny: He says, "You're too 5. to smoke (吸烟)."
Jenny: Haha, Wonderful!
如术后唇部张力较大,使用唇弓减张时间应至少为
A.7天
B.10天
C.14天
D.1个月
E.半年