题目内容

曲线xy=1在(1,1)处的曲率为2。()

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无穷小与任意函数的积是无穷小。()

函数f在闭区间[a,b]上连续，则f在该区间上有界。()

Part A
You are Cindy Molly. You know that the English Language and Literature Department in Belling Foreign Studies University has a position vacant. You want to get that position. And then you write this letter to them expressing your interests in this position. (120～170 words)

______ with pumps, drains, and wells may cost more than the dam itself.