已知（m﹣1）x^|m|+1﹣3x+1=0是关于x的一元二次方程，则m=____ 

如图,均匀带正电的绝缘圆环a与金属圆环b同心共面放置,将a绕O点在其所在平面内旋转时,b中产生顺时针方向的感应电流,且具有收缩的趋势,由此可知,圆环a(     )

根据短文理解，从A、B、C、D四个选项中选择最佳填空。

    Hi, my name is Dave. I'm 8 1 old. My birthday is 2 December 12th. I have 3 birthday party every year. Today I have my 4 birthday party. I get some gifts at the party. 5 are very good and I really like them. This 6 T-shirt is from my mother. Green is my 7 color. My mother buys me a pair of green 8, too. My father buys some 9 about history for me, because I like 10 best. I think these books 11 very interesting. My grandparents 12 I like playing basketball, 13 they buy me a basketball. I can 14 it with my friends after class. I'm very happy today.

    15 is your birthday, my friend? Do you have a party, too?