【简答题】The following phrases are all used to describe people. Check the meaning of he words in bold in your mini-dictionary or with your teacher. Then mark the phrases as follows: (A) if they are positive. (...
【判断题】对增值税一般纳税人向购买方收取的价外费用和包装物押金,在征税时直接并人销售额征税。
【判断题】对增值税一般纳税人向购买方收取的价外费用和逾期包装物押金,应视为不含税收入。
【单选题】根据所示的主视图和俯视图,选择正确的左视图。
【简答题】设m>n.证明:2 n -1|2 m -1当且仅当n|m.
【简答题】设A是有限集合,且|A|=n.证明:|P(A)|=2n.
【简答题】对于n.证明:f(n)=3 2n+2 -8n-9是的倍数.