下列叙述中错误的是①DNA分子结构的基本骨架决定蛋白质的空间结构②RNA聚合酶催化的底物是RNA③溶酶体能将大分子物质水解但不能将其彻底氧化分解④细胞骨架是由磷脂分子构成的网架结构
A:①②③
B:①②④
C:①③④
D:②③④
— Is your father free these days?
—No. He has mountains of work to do. He gets up early and comes back late every day.
读图,完成下列问题.