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【单选题】
慢性风湿性心瓣膜病最常见的联合瓣膜病变是A.
二尖瓣和三尖瓣
B.
二尖瓣和主动脉瓣
C.
三尖瓣和肺动脉瓣
D.
三尖瓣和主动脉瓣
E.
主动脉瓣和肺动脉瓣
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【单选题】The teacher told the students any food into the computer room.
A.
not to bring
B.
not bring
C.
don’t bring
D.
bring not
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【单选题】The teacher told the student that light()faster.
A.
travels
B.
traveled
C.
would travel
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