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【单选题】
杯环芳烃是由对叔丁基苯酚和甲醛在碱性条件下反应得到的大环化合物，因其分子形状与希腊圣杯相似而得名。又因可作为酶模拟物发挥出离子载体、分子识别及酶催化活性等特殊功能，成为人们关注的一个新的研究课题。下列关于杯环芳烃说法正确的是 [ ]A.
属于芳香烃
B.
分子式为C 44 H 56 O 4
C.
分子中所有原子都在同一平面上
D.
能与浓溴水发生取代反应
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皮皮学刷刷变学霸
举一反三
【单选题】According to this report, various types of packaging come into existence to ______.
A.
meet the needs of consumers
B.
suit all kinds of products
C.
enhance the market position of products
【简答题】Wann bekomme ich das Visum? ____ Sie es noch nicht ____ ?
【单选题】Various types of packaging come into existence to ______ the market position of products.
A.
amplify
B.
foster
C.
enhance
D.
magnify
【简答题】be selected to provide a mix of various types of return. Basically, there are two only
【简答题】神经一肌肉接头处的化学递质是（ ）
【单选题】According to this passage, various types of packaging come into existence to ______.
A.
meet the needs of consumers
B.
suit all kinds of products
C.
enhance the market position of products
D.
introduce new products
【简答题】神经肌肉接头处的化学递质是 ___________ ,消除这个递质的物质是 ___________ 。
【简答题】According to this passage, various types of packaging come into existence to ________. A) meet the needs of consumers B) suit all kinds of products C) enhance the market position of products D) introd...
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