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