号称杭州“双绝”的是（）冲泡西湖龙井茶。
A.虎跑泉
B.虎丘泉
C.趵突泉
D.惠山泉
参考答案：A
已知函数f（x）=x3+x-16．求曲线y=f（x）在点（2，-6）处的切线的方程．
On 1 January 2010 a company enters into a lease agreement to lease a piece of machinery as the lessor with the following terms:（）
A.82014
B.66514
C.82514
