正常下颌铰链开口度为()。
A.3mm
B.10mm
C.12~16mm
D.18~25mm
E.40~60mm
参考答案:D
Is your aunt a dancer? [ ]
A. Yes, he is.
B. Yes, she is.
In order to help the police, the eyewitness described what he had seen very carefully not to______ any key clues.
A.cut off
B.leave off
C.squeeze out
D.leave out