题目

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。 When meeting people at the airport, most people smile and shake hands with people they meet. We know that a smile is usually a sign that people feel friendly and happy, 60．what if we don’t know who the new person is? What if we are not 61．(introduce) by a friend? Sometimes people are dangerous and humans have to find ways to protect 62． (themself). We have to make sure we can trust people we do not know, and we have to show that we are not dangerous, showing our hands means t中国的城市正在面临着垃圾围城的困扰。目前天津已建成三座垃圾发电厂，采用先进的空气净化工艺，把垃圾用来焚烧发电，废渣用来制砖，余热用来取暖，形成一个完整的循环级链，有效地改变了过去传统垃圾处理方式对环境的严重影响。据此回答小题。1.关于建垃圾发电厂对天津的影响，叙述正确的是(　　)A．解决了能源紧张状况B．改善了城市环境质量C．加剧了人地矛盾D．冬季取暖完全由余热提供2.城市垃圾除焚烧发电外，以下哪种方式还符合可持续发展思想(　　)A．垃圾分类填埋处理 B．露天焚烧C．分类处理，废弃物再利用 D．远郊堆放，自然降解