胰岛素的化学本质是（）
A.蛋白质
B.类固醇
C.核苷酸
D.脂肪酸衍生物
E.氨基酸衍生物
参考答案：A
—Does Hong Kong Disneyland ________different parks?
—Yes, there are four parks in it, ________Tomorrowland and Fantasyland.
A．include, including
B．including, include
C．include, include
D．including, including
植物组织培养快速繁殖技术基于细胞的（）特性。
A.特异
B.全能
C.分裂
D.变异
