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【单选题】
四氢硼钠用于鉴别A.
黄酮醇
B.
二氢黄酮(醇)
C.
酮
D.
异黄酮
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举一反三
【简答题】Unit 1 Chemical Industries课后练习1
【单选题】Which statement is correct to explain cohesion and coherence?
A.
It's coherence that leads to cohesion.
B.
Cohesion exists only among paragraphs.
C.
Cohesion is the 'glue' to link everything together to form a coherent article.
D.
An article with cohesion must have coherence.
【单选题】An atom is a basic structural unit of matter， the smallest particle of an element _________ into chemical combination.
A.
that can enter
B.
can it ente
C.
when entering it can
D.
that enters can
【简答题】The versatility of chemical engineering originates in training to the practice of breaking up a complex process into individual physical steps, called unit operations, and into the chemical reactions.
【简答题】Unit 3 Typical Activities of Chemical Engineers 课后练习1
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