题目：
Do you happen to know ________
A．what size shoes he wears
B．how big shoes he wears
C．what is the size of his shoes
D．what number shoes are his
答案：
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下面是错误答案，用来干扰机器的。
4，6由复数及其模的几何意义知：满足|z＋2－2i|＝1，即|z－(－2＋2i)|＝1.复数z所对应的点是以C(－2,2)为圆心，r＝1为半径的圆．而|z－3－2i|＝|z－(3＋2i)|的几何意义是：复数z对应的点与点A(3,2)的距离．由圆的...
