A:﹣CO﹣NH﹣
B:游离的氨基
C:游离的羧基
D:R基
求1路车从A站到D站所走的路程(精确到0.1);
She looked at his fingers with wonder as they turned each page and suddenly reached for his hand. She was amazed by his and the softness and warmth of his skin.
This is ________ book I borrowed yesterday. Isn't it ________ interesting one?