Poets and artists often draw their (inspire) ____from nature.
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You shouldn't read his letters, because they are (privacy) ____.
Can you describe the detailed (specify) ____of your product?
She opened her first (save) ____account at the age of 18.
以下哪种氨基酸不是犬猫的必需氨基酸（ ）
A. 蛋氨酸
B. 赖氨酸
C. 苏氨酸
D. 丙氨酸
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