∵a>0,
∴|a|a=aa=1;
∵a<0,
∴|a|a=-aa=-1.
某商品进价为800元,出售时价格为1200元,后来由于该商品积压,准备打折出售,但要保证利润不低于5%,你认为该商品至多可以打几折?
There _______ many new books in your room. But I _______ only one. [ ]
A. have; have
B. is; have
C. are; has
D. are; have