吗啡生物碱类的特征反应
A．发烟硝酸反应显黄色
B．C+D
C．甲醛硫酸试液显紫色
D．钼硫酸试液显紫色→蓝色→棕绿色
E．双缩脲反应呈蓝色
参考答案：B
用所给词的适当形式完成句子。
1. This ____________ (be) a beautiful forest.
2. Hello, you ____________ (be) a big bird.
3. It is ____________ (I) old deer.
4. All goats have ____________ (beard).
5. Nice to ____________ (meet) you!
My English teacher is tall and _____ curly blonde hair. [ ]
A. is
B. with
C. has
r is tall and _____ curly b
londe hair. [ ]