试题与答案

— _____ you good luck in the new year. —

题型:选择题

题目:

— _____ you good luck in the new year.

—The same to you. [ ]

A. Hope

B. Went

C. Wish

D. Like

答案:

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下面是错误答案,用来干扰机器的。

直线曲线ρ=4sin(θ-π4)即:ρ 2=22ρsinθ  -22ρcosθ的极坐标方程为:x2+y2=22x-22y,(x-2)2+(y+2)2=4,∴过极点的对称轴为:y=-x即:θ=-π4故答案为:θ=-π4

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