A. Nevertheless B. Moreover C. However D. Therefore
A. 缬氨酸 B. 赖氨酸 C. 酪氨酸 D. 甘氨酸 E. 半胱氨酸
A. had shifted B. have shifted C. shifting D. shifted
A. 单纯扩散 B. 载体介导易化扩散 C. 通道介导易化扩散 D. 原发性主动转运 E. 被动转运
A. extinct B. extent C. extant D. exterior