怎样算简便就怎样算.
78.5×0.8-8.5×0.8
解:78.5×0.8-8.5×0.8
=(78.5-8.5)×0.8
=70×0.8
=56
①都是可能获得一定收益的有价证券
②都是筹集资金的有效手段
③二者的偿还方式相同,都能还本付息
④二者的收益风险水平相同
一学生从洋葱鳞片叶上撕下一小块透明的表皮按课本的实验步骤制成玻片标本,这种玻片标本称为( )
Nowadays,food safety has become the________of the government as well as the society.