电极糊类产品粒度组成中大于大粒子的含量不许超过()
A、3%
B、4%
C、5%
D、6%
参考答案:C
He once observed that "All happy families ____ one another, but each unhappy family is unhappy in
its own way". [ ]
A. like
B. appear
C. resemble
D. represent
一个多边形的每一个外角都等于18°,它是______边形.