下列哪种品牌适合于普通百姓？（）
A、动感地带
B、全球通
C、神州行
D、其他
参考答案：C
Excuse me I _____ I was blocking your way. [ ]
A. didn't realize
B. don't realize
C. haven't realized
D. wasn't realizing
已知x2+y2+4x﹣6y+13=0，那么xy=（ ）。
