女性生殖腺为()
A.子宫
B.输卵管
C.卵巢
D. * *
E.前庭大腺
参考答案:C
Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first
_____. [ ]
A. intention
B. attempt
C. purpose
D. desire
生物碱的分类方法有数种,一按植物来源分类,二按生物碱生源途径分类,三按氮原子存在的主要杂环母核类型分类,现按已知生物碱主要母核分。
属于莨菪烷类生物碱有()
A.阿托品
B.去甲乌药碱
C.麻黄碱
D.苦参碱
E.毛果芸香碱