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Lily often helps her sister her homework.forB．tC．ofD．withLily often helps her sister her homework.for B．t C．of D．with

A. for
B. at
C. of
D. with

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sets mnprt from the rest of thenimls is hisbility to use work tools.Tht sets mnprt from the rest of thenimls is hisbility to use work tools.Tht B．Which C．Who D．Wht

A. That
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B. 主动脉瓣狭窄
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配制 FeCl 2 溶液必须加入 Fe 粉的目的是防止（）

A. FeCl 2 水解
B. FeCl 2 被氧化
C. FeCl 2 岐化
D. FeCl 2 被还原

患者女性，查体可触及水冲脉，该患者最可能是主动脉瓣关闭不全B．主动脉瓣狭窄C．肺动脉瓣狭窄D．二患者女性，查体可触及水冲脉，该患者最可能是主动脉瓣关闭不全 B．主动脉瓣狭窄 C．肺动脉瓣狭窄 D．二尖瓣狭窄 E．心包积液

A. 主动脉瓣关闭不全
B. 主动脉瓣狭窄
C. 肺动脉瓣狭窄
D. 二尖瓣狭窄
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