党参的组织结构中有
A．油细胞B．油室C．油管D．树脂道E．乳汁管
参考答案：E
解析：党参的组织结构中有乳汁管。故答案选E。
—It seems that we never see the advertisement on cigarettes on TV.
—Absolutely right. There is a total ______ on cigarette advertising in our country. [ ]
A. number
B. cost
C. failure
D. ban
企业购入用于工程经营活动、将构成工程实体或产品实体的存货类型是( )。
A．主要材料
B．施工产品
C．委托加工物资
D．库存材料
