手足口病是由肠道病毒引起的传染病，多发生于婴幼儿，可引起手、足、口腔等部位的疱疹，个别患者可引起心肌炎、肺水肿、无菌性脑膜炎等并发症。引发手足口病的肠道病毒有20多种(型)，以下关于肠道病毒的叙述正确的是（   ）

现有25克CO和O₂的混合气体充分燃烧，将生成的气体通入足量的石灰水，发现烧杯内的物质增重22克，则原合气体中CO质量可能是（　　）

    My best friend and I are in the same school. Her name is Alice. We first met each other two years ago. We were all new in the school then. She is beautiful. She has long black hair, round black eyes and a small nose. She doesn't like to dress up, so I usually see her wearing jeans and a T-shirt or sweater.

    Alice and I are always talking or laughing about something. She has a wonderful sense of humor (幽默感). When I am not happy, I like talking to her. And she always tries her best to make me happy.

    We have the same interests. We both enjoy playing the guitar and singing. We like going to the movies. Sometimes in summer, I go with her and her family to their summer house by the lake. We usually spend most of the afternoon swimming. In the evenings we walk into town or stay at home and watch TV. It's always fun to be with her.

    Though our lives get busy, we still have time to see each other. I am better in math and science and she is better in English, so we often help each other with our homework.

    I am lucky to have a friend like her.