通货紧缩从本质上讲是一种货币现象。()
参考答案:对
There’s no doubt _______ Emily will be the hostess (女主持) of the New Year’s party.
A.if
B.when
C. what
D.that
乳牙面洞深度()
A.牙釉质内lmm
B.洞深1~1.5mm
C.牙本质内
D.釉牙本质界处
E.与龋坏最深处一致