生长鸡日粮中缺乏泛酸和生物素均可出现()症状。
参考答案:皮炎
During the tenday vacation, they traveled to many parts of France ________ their own expense.[ ]
A.on
B.with
C.at
D.in
领导者的职权,()。
A.具有强制性与非强制性
B.具有强制性
C.包括了领导者的个人魅力
D.即是领导影响力