烤瓷合金与瓷粉应严格匹配的是
A．硬度B．熔点C．热膨胀系数D．收缩率E．颜色
参考答案：C
Such deer________mainly________green grass, as we know.[ ]
A. feed, on
B. feeds, on
C. feeds, with
D. feed, with
领导群体结构
