题目

Social Media Social media can be defined（解释）as web-based and mobile media that are used for people to interact,connect and communicate with each other.It often involves the creation and sharing of content (writing,pictures,and video) that people make themselves,mostly through the Internet. _36_The first type involves people getting together to work on a project,for example,Wikipedia.Blogs and micro-blogs (such as Twitter) are another type of social media.There are other websites like YouTube that allow people to share content such as pictures,articles or videos._37_These sites a1．下列生物中不能产生果胶酶的是（　　）A．植物B．动物C．霉菌D．酵母菌