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问题
单项选择题
红斑肢痛症发病时可能加重症状的诱因是（）
A.高温
B.寒冷
C.月经
D.饥饿
E.平卧
答案
参考答案：
A
选择题
— Remember the first time we _____, Ed?
— Of course, I do. You _____ a song on the stage.
A. have met; sang
B. met; sang
C. met; were singing
D. have met; have sung
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问答题 简答题
逆流式无充填介质型浮选柱的特点？
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