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【简答题】
下面哪种毒素不是食品原料中的天然毒素 A 、生氰苷 B、棉酚 C 、亚硝胺类毒素 D、河豚毒素
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皮皮学刷刷变学霸
举一反三
【简答题】烯烃的化学性质主要表现在哪个官能团上？
【简答题】柏拉图不可被人感觉到但可被人知道，绝对永恒与不变的一般事物称为（）。
【单选题】Which of the following is desirable when defining a debate motion?
A.
Providing dictionary definitions for words or phrases that might not be understood.
B.
Explaining every word so that there will be no misunderstanding.
C.
Narrowing the motion for a more focused debate.
D.
Focusing on issues and arguments in favor of the proposition.
【多选题】When defining a word with a paragraph the writer need consider the following elements _______.
A.
its name
B.
the components of the thing to be defined
C.
Its functions.
D.
Its origin and illustration/example.