摘要:
In a certain course, you take n tests. If you get ai out of bi questions correct on test i, your cumulative average is defined to be . Given your test 阅读全文
posted @ 2017-05-10 16:12
天之道,利而不害
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摘要:
Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration (that must be going th 阅读全文
posted @ 2017-05-10 14:31
天之道,利而不害
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