无牙颌患者下颌处于正中关系位时上下颌牙槽嵴顶间的距离称为()
A.开口度
B.息止颌间隙
C.垂直距离
D.正中关系位时颌间距离
E.覆
参考答案:D
— Is it good to look up every new word when I come across it in reading?
—No,you _____,because you are likely to guess the meaning from the context,
A.don't have to
B.shouldn't
C.can't
D.mustn't
我国现行税法规定,纳税人因特殊困难,不能按期缴纳税款的,经批准,可以延期缴纳,但最长不得超过()。
A.1个月
B.3个月
C.6个月
D.1年