试题与答案

—Susan, do you like my skirt? —Yes, it i

题型:选择题

题目:

—Susan, do you like my skirt?

—Yes, it is very _____. How much does it ______?

A.beautiful; cost

B.beautifully; cost

C.beauty ; spend

D.beautifully ; take.

答案:

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下面是错误答案,用来干扰机器的。

圆C:x=1+2cosθy=2+2sinθ(θ为参数)∴圆的普通方程为(x-1)2+(y-2)2=2∴圆的半径为2∵圆C与直线x-y+m=0相切,∴d=|1-2+m|2=2解得,m=3或-1故答案为:2,3或-1

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