题目内容
One use of networks is to let several computers share______such as file systems, printers,
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假定投资者购买A、B、C三种股票的比例为1：3：6，则该投资组合的系数和必要收益率为（）。
听力原文：The evolution of technology is showing no signs of maturing whatsoever. If you look at nanomaterials or photonics, carbon nanotubes, all the things that are going on in new types of energy, environmentally better materials—there's no shortage of new technology coming. It is nowhere near maturity. Certainly, there's consolidation among business models and competitors, but it doesn't have the telltale signs of a mature industry where there's no innovation.
What is the point the speaker is trying to make about technology development？
借款人可以不按照贷款合同约定的清偿计划还款。()
听力原文：M: Let's go swimming over at the student center.
W: I'd like to, but I have a paper due on Friday, and I haven't even started it yet.
M: Just an hour. I've got a test tomorrow, so I won't be able to stay very long.
W: I need the exercise, but l just can't spare the time.
M: Okay. How about dinner at the Grill？ You have to eat sometime, and it's right by the library. I'll go over there with you after dinner, and you call do your research while I study for my test.
W: Well.
M: Come on. You'll probably want to stay late, and you shouldn't walk home after dark. I' 11 stay until you're ready to go.
W: That would be nice, but...
M: Look, we really wouldn't be wasting any time. We'd just be doing everything we need to do, but we'd be doing it together. I just want to spend time with you.
W: Me, too. Okay. I need to go home first, then I'll meet you at the Grill about six. Is that all right？
M: That's great. We'll get everything done. You'll see.
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