答案:A
—I’m afraid I can’t go to your party; I have lots of things to do.
—________.
A.Take it easy
B.No problem
C.So what
D.What a shame.
光固化复合树脂充填时,分层光照每层的厚度不超过()。
A.0.5mm
B.1mm
C.1.5mm
D.2mm
E.2.5mm