风湿性心瓣膜疾病最常见侵犯的瓣膜是()
A.主动脉瓣
B.肺动脉瓣
C.二尖瓣
D.三尖瓣
E.人工瓣膜
参考答案:C
Bill's just __________ himself a part in a Broadway show.
A.led
B.landed
C.argued
D.lost
现金和现金等价物包括()
A.应收帐款
B.现金
C.银行存款
D.其他货币资金