A、n'en
B、n'y
C、--
D、le
A、have to apologize to the professor for that.
B、fail the assignment and fail the class.
C、be expelled from the university.
D、receive a note on their permanent academic record.
A、decreasing or eliminating biological activity of non-nutrient substances
B、decreasing or eliminating toxity of most of non-nutrient substances
C、increasing the solubility of non-nutrient substances
D、equal to detoxicification
E、facilitating the excretion of non-nutrient substances from the body
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