小明做对了14道题，小红做对了17道题，小强只做对了9道题，他们一共做对了多少道题？
14+17+9=40（道）
Mr. Wang is a man of _________ and we have got much _________ from him about how to make a living.
A．experience; experiences
B．an experience; an experience
C．experiences; experience
D．experiences; experiences
前牙烤瓷熔附金属冠牙体预备时，唇面牙体组织应磨除 （）
A.0.5～1.0mm
B.1.2～1.5mm
C.1.6～1.8mm
D.1.8～2.0mm
E.2.0～2.5mm
