艾片原植物属于() ["菊科","豆科","茜草科","漆树科","海金沙科"]
细胞核的功能() ["具有遗传物质","控制物质进出","代谢的场所","光合作用"]
下列关于率的标准误的叙述,错误的是() ["样本率的标准差称率的标准误","率的标准误反映率的抽样误差大小","率的标准误越小,用样本率估计总体率的可靠性越大","率的标准误可以用公式Sp=p(1-p)\/n来计算","适当增大样本含量可减少率的标准误"]
五倍子寄主的原植物属于() ["菊科","豆科","茜草科","漆树科","海金沙科"]
安息香() ["与水共研呈白色乳状液","与水共研呈黄棕色乳状液","粉末遇硝酸呈紫色","研粉红似血,火燃可产生呛鼻的烟气","用微量升华可见棱柱状结晶"]
试述引起继发性高血压的常见原因。