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【单选题】
目前用干细胞治疗最成功的疾病A.
白血病
B.
糖尿病
C.
神经退行性疾病
D.
心肌梗塞
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举一反三
【单选题】听力原文：M: I see. You're late because you had a flat tire. But couldn't you have telephoned? W: I was going to but I didn't have any change for a pay phone. Q: What can we learn from the conversation? (1...
A.
The woman came late because she had no money for the taxi fee.
B.
The woman failed to come on time bemuse of a traffic jam.
C.
The woman failed to come on time because she had no money to replace the flat tire.
D.
The woman failed to notify the man because she had no change for a telephone call.
【单选题】听力原文：M: I see. You're late became you had a flat tire. But couldn't you have telephoned? W: I was going to but I didn't have any change for a pay phone. Q: What 'can we learn from the conversation? (1...
A.
The woman came late because she had no money for the taxi fee.
B.
The woman failed to come on time because of a traffic jam.
C.
The woman failed to come on time because she had no money to replace the flat tire.
D.
The woman failed to notify the man because she had no change for a telephone call.
【简答题】设 在 处连续, ,且 ,则
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