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【单选题】
动脉韧带A.
又称动脉导管
B.
肺动脉干分叉处与升主动脉之间
C.
是胚胎时期动脉导管闭锁后的遗迹
D.
出生6个月以后闭合
E.
以上都正确
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【单选题】听力原文：W: I hear that your sister Catherine was a great student. M: She is. She hasn't graduated yet. Q: What does the man think of Catherine? (16)
A.
She has finished her school.
B.
She is not a good student before.
C.
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D.
She's still a student.
【单选题】听力原文：W: I hear that your sister Catherine was a great student. M: She is. She hasn't graduated yet. Q: What does the man think of Catherine? (16)
A.
She has finished her school.
B.
She hasn't finished her final paper.
C.
She is not a good student before.
D.
She's still a student.
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