Once we are in charge of love, it can be with us for the rest of our lives.()
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(A Lesson in Living) Marguerite wanted to behave like a nice little lady in front of Mrs. Flowers.()
(I’ll Never Escape the Ghetto) The Watts riots give rise to a flourishing of ghetto literature and art.()
As a woman volunteer, she is keen on uniforms.()
组成人体的必需氨基酸是
A. 丙氨酸
B. 甘氨酸
C. 瓜氨酸
D. 色氨酸
E. 半胱氨酸
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