国际上饭店业的食品饮料成本率一般为(),在我国饭店业中餐饮原料的成本率要高一些。
A.5%—15%
B.20%—30%
C.30%—35%
D.40%—55%
参考答案:C
We should do more such exercises in the future, I think, _____ those we did yesterday.
A.as
B.like
C.about
D.than
Visual FoxPro的“参照完整性”中“插入规则”包括
A.级联和忽略
B.级联和删除
C.级联和限制
D.限制和忽略