关于淀粉、蛋白质和核酸的叙述,正确的是( )
A:都含C、H、O、N四种元素
B:都是由单体聚合而成的多聚体
C:合成过程都需要模板
D:都具有功能的多样性
—What do you think of the robots in the future?
—I think they won't __________ do all the work like humans.
Research findings have shown that about 20 percent of people only 10 percent can be ____(分类) as “early birds”.