乙酸-浓硫酸反应为阴性的是( )
A.甲型强心苷 B.乙型强心苷 C.C-洋地黄毒糖 D.甾体皂苷 E.三萜皂苷
参考答案:C
解析:[知识点] 强心苷的显色反应
出版社:作者
A.律师:当事人
B.村委会:乡政府
C.县政府:外商
D.检察院:公安局
Some of the students are afraid of the teachers strict with students. [ ]
A. that is
B. who is
C. which are
D. who are