單項選擇題

骨性Ⅲ錯ANB角為()

A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°


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1.單項選擇題新生兒下頜角為()

A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°

2.單項選擇題成人下頜角為()

A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°

3.單項選擇題3歲時下頜角為()

A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°

4.單項選擇題12歲時下頜角為()

A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°

5.單項選擇題

由頰舌兩個臂和支托組成的包繞基牙三個或四個軸面的卡環(huán)為()

A.正型卡環(huán)
B.連支卡環(huán)
C.長臂卡環(huán)
D.連續(xù)卡環(huán)
E.環(huán)形卡環(huán)