【名词&注释】
“十二五”、农作物(crop)、表现形式(manifestation)、需求量(demand)、现代农业发展(modern agricultural development)、价格下降(a dip in price)、购销差价(purchase sale price difference)
[多选题]下列属于质量差价的有( ) 。
A. 品种差价
B. 地区差价
C. 等价差价
D. 购销差价(purchase sale price difference)
E. 包装差价