可用于区别3-羟基黄酮和5-羟基黄酮的显色反应是()
A.四氢硼钠反应
B.锆盐-枸橼酸反应
C.三氯化铝反应
D.氨性氯化锶反应
E.硼酸反应
参考答案:B
根据下列句子及所给单词的首字母,在答题卷上按题号写出各单词的完全形式(每空限填一词)。
小题1:Can you help me w______ my English?
小题2:He leaves for school after a q______ breakfast.
小题3:To be healthy, my parents never forget to e______ in the morning.
小题4:Alice isn’t w______ TV. She is reading a book.
小题5:I’m afraid to get l______ because I’m new in the city.
小题6:Some animals are f______ to people so we like them.
小题7:Many people have dogs as p______.
小题8:Mum isn’t at home today. My father and I have to eat o______.
小题9:Can you play the g______ or the piano?
小题10:My home is about five k______ away from school.
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