生石灰质量要求：CaO≥（）%，S≤（）%。
参考答案：80；0.45
--- Look, this pair of shoes beautiful, right?
--- Yes. But they don’t fit me .
A．is, very much
B．is, very well
C．are, very much
D．are, very well
为什么以玉米为主食的地区易发生赖皮病？
