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【B2】
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银行汇票的提示付款期限为自出票日起1个月。()
关于证券投资的最小方差组合,下列表述正确的有()。
听力原文：M: Do you happen to have any stamps in your place？
W: Yes, I have some. What stamps do you want？
M: Four fifties and tens
W: I don't think I have that many. But I have an idea, why not use our school's envelopes？ Here you are.
M: What is the difference？ We still need to buy stamps.
W: No, look here, Postage Paid.
M: That's great. You are a big help.
What stamps does the man want？
工厂总平面设计的根本目的就是()。
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