未锻造的合金，含铂量1%，含金量1%，含银量大于2%( ) A．22 B．23 C．24 D．25
参考答案：C—71069100
风湿性心瓣膜病首要潜在并发症，也是本病就诊及致死的主要原因是（）
A.心律失常
B.栓塞
C.亚急性感染性心内膜炎
D.肺部感染
E.充血性心力衰竭
Prince William got married to Kate _________ April 20ll and their wedding was held _________ Westminster Cathedral（教堂）.
A．on/in
B．in/in
C．on/on
D．in/on
