题目

How to Help Children Understand Social DistancingLike most people, you're probably worried about the COVID-19 and want to keep your family safe. Happily, practicing social distancing is an easy way to help limit the spread of virus so fewer people get sick. You can hele your children understand why social distancing is important.【1】 Although experts are still learning about COVID-19 spreads, it appears that non-symptomatic（无症状） people can still spread the virus. Because of this, it's necessary to stay away everyone, whether or not they appear sick. Tell your kids social distancin细菌和真菌在生态系统中属于(    )A．生产者B．消费者C．分解者D．食物链