题目内容

茶叶的苦涩味主要来源于The bitter and astringent taste of tea is mainly from

A. 咖啡碱caffeine
B. 茶多糖tea polysaccharide
C. 氨基酸amino acid
D. 茶多酚茶tea polyphenol(TP)

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A. 对
B. 错

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B. Go to school.
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Do homework.

A. He has no interest in the party.
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A. Bring some water for her.
B. Wait for her.
C. Do nothing for her.
D. Pay the bill for her.