问题
单项选择题
较适合采用牛角钳拔除的患牙是()
A.上颌第一磨牙
B.上颌第二磨牙
C.上颌第一前磨牙
D.下颌第一磨牙
E.下颌第二磨牙
答案
参考答案:D
解析:因下颌第一磨牙一般为近、远中两个根,牛角钳正好可置于两根分叉间。
较适合采用牛角钳拔除的患牙是()
A.上颌第一磨牙
B.上颌第二磨牙
C.上颌第一前磨牙
D.下颌第一磨牙
E.下颌第二磨牙
参考答案:D
解析:因下颌第一磨牙一般为近、远中两个根,牛角钳正好可置于两根分叉间。
完形填空。 | ||||
Look 1 picture 2 . Jim's room. His family 3 is on the wall. 4 jacket is on the bed. His computer 5 on the table. His keys are 6 the drawer. His pencils 7 in the pencil case. Where 8 his baseball? Oh, it's 9 the floor. 10 likes his room very much. | ||||
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