在运行中氢气保持高纯度主要是出于()方面的考虑
参考答案:安全和经济
()是计算机会计的初级阶段。
A.财务会计
B.电算化会计
C.预算会计
D.管理会计
In our childhood, we were often ___ by Grandma to pay attention to our table manners.
A.demanded
B.reminded
C.allowed
D.hoped