题目

A Japanese company has created a smart“ mask （口 罩）that aims to improve communication for people wearing face coverings to prevent the spread of COVID-19.The use of face masks has become the new common practice in parts of the world still struggling to reduce the spread of the coronavirus. However, masks and other kinds of coverings can affect the quality of communication between wearers. The wearable electronic device （设备） called the c — mask“ is meant to fit over other kinds of face masks commonly worn by the public. It's designed to better the exchange of conversation i下列符合现代生物进化理论的叙述是 [     ]A．物种的形成可以不经过隔离B．生物进化过程的实质在于有利变异的保存C．冬季来临时植物叶中可溶性糖含量增高是为了更好地防止冻害D．自然选择通过作用于个体而影响种群的基因频率