一型观测线测出的倒凹区主要位于基牙的()。
A.近缺隙侧
B.远缺隙侧
C.近远中均有明显倒凹
D.面
E.外形高点区
参考答案:B
社会政策评估
Some 1,000 new words or usages join the English language each year. Some go into the dictionary. Others _______ from use.
A.remain
B.leave
C.fail
D.fade