she grew older she gained in confidence. [ ]
A. With
B. As
C. While
D. When
答案:B
患儿,3岁,诊断为缺铁性贫血,血红蛋白80g/L。为改善贫血症状,最佳食物是()
A.米粉、橙汁
B.动物肝脏、紫菜
C.鱼、水果
D.海带、海虾
E.紫皮萝卜、白菜
只要对电动机绕组的接线作Y-△或△-Y变换,电动机的额定电压就能适应2个电压等级。()