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【单选题】
牙合面发育沟大约有“Y”、“H”、“U”型的牙是:A.
下颌第一磨牙
B.
上颌第二前磨牙
C.
下颌第一前磨牙
D.
下颌第二前磨牙
E.
下颌第二磨牙
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反馈参考答案：
举一反三
【简答题】接长钢筋有三种办法:( )、( )、( )。
【单选题】To their great relief, the missing child returned home, ______, after an absence of two weeks.
A.
looked tired and healthy
B.
tired and healthy
C.
tiredly and healthily
D.
looking tired and healthily
【单选题】These two horsed look so much alike that we cannot ______ one from the other.
A.
differ
B.
detail
C.
distinguish
D.
defeat
【单选题】It is reported that the police will soon _____ the case of the two missing children.
A.
look upon
B.
look after
C.
look into
D.
look out
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