Li+进入唾液的主要方式为()
A.易化扩散
B.被动扩散
C.主动转运
D.胞饮
E.滤过
参考答案:C
A: You _____ Tom. What _____ her name?
B: I don't know.[ ]
A. is, are
B. am, are
C. are, is
D. is, is
完成化学方程式
(1) 铁丝在氧气中燃烧_________________________
(2) 铜与硝酸银溶液反应________________________
(3) 工业用赤铁矿炼铁_________________________