题目内容

仙人指与蟹爪兰的区别在于其茎节边缘呈浅波状，花为辐射对称。()

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曲线xy=1在(1,1)处的曲率为2。()

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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)