【简答题】【消耗次数：1】
黄酮类化合物所显颜色与分子中是否存在[填空1]及[填空2]的数目和位置有关。
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相关题目
【简答题】
黄酮类化合物所显颜色与分子中是否存在[填空1]及[填空2]的数目和位置有关。
【简答题】
黄酮类化合物常用提取方法有[填空1]法，[填空2]法。
【简答题】
黄酮类化合物常用提取方法有[填空1]法，[填空2]法。
【多选题】
关于黄酮类化合物的理化性质，下列说法正确的是
①
黄酮类化合物都溶于水
②
黄酮类化合物因其结构不同，溶解度差异大
③
黄酮苷一般易溶于水、乙醇、甲醇
④
黄酮苷一般易溶于石油醚、氯仿等有机溶剂
⑤
游离苷元易溶于水
【简答题】
黄酮类化合物的基本母核是[填空1]。现泛指两个苯环(A与B环)，通过[填空2]相互联结，具有[填空3]基本骨架的一系列化合物
随机题目
【单选题】
Thank you ever so much for the scarf you bought me.____________
①
No thanks.
②
No, it’s not so good.
③
I’m glad you like it.
④
Please don’t say so.
【单选题】
Everybody likes her because she is always _______ .
①
Everybody likes her because she is always _______ .
②
cheerful
③
sad
④
selfish
【单选题】
It is the general manager who makes the _______decisions in business.
①
beginning
②
finishing
③
first
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final
【单选题】
Those gifts o rare books that were given t us were deeply _____.
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appreciated
②
approved
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appealed
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applied
【单选题】
Haven’t seen you for ages! What are you busy doing now?____________
①
I hate the weather here.
②
My hair is getting a bit longer.
③
I am working part time in a bookshop, you know.
④
Yeah, thanks for coming.
【单选题】
We are planning an outing. _________ Sure.
①
Where are you going?
②
When will you leave?
③
How is everything?
④
Do you want to join us?
【单选题】
It is dangerous to ______ outdated(过时的) ideas and theories.
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cling to
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strive for
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run through
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resort to
【单选题】
I had my meals ______ when I was ill in bed with a bad cold.
①
to bring
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bring
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brought
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bringing
【单选题】
Don’t make faces in class.____________
①
Excuse me, I am wrong.
②
Certainly, I will.
③
That’s OK.
④
Sorry, I won’t do it again.