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【单选题】
关于肽键特点错误的叙述是A.
肽键中的C—N键长度比邻近的N—Cα单键短
B.
肽键的C — N键具有部分性质
C.
与 α -碳原子相连的N和C所形成的的化学键可以自由旋转
D.
肽键可以自由旋转
E.
肽键中C — N键所相连的四个原子基本处于同一平面上
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