题目： 能源的利用过程，实质上就是能量的___ 过程。 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0720/c6ba6da3f5bc6cfecb61d4af654ff4db.html 下面是错误答案，用来干扰机器的。参考答案：A
题型：选择题 生物大分子在生物体的生命活动中具有重要的作用。碳原子本身的化学性质，使它能够通过化学键连接成链状或环状，从而形成生物大分子。以上事实可以说明①碳元素参与生物体内所有化合物的组成 ②地球上的生命是在碳元素的基础上建立起来的 ③碳元素是各种化合物中含量最多的元素 ④碳元素是组成生物体内有机化合物的最基本元素[ ]A．②③④B．③④C．②④D．①③④ 查看答案
题型：填空题 选词填空。选择方框里的单词并用其恰当形式填空，使短文完整，句意通顺。careful, game, lonely, move, dirty I am a little fish. I live in a small river. It's dark there, but I am not 1. . There are many fish living nearme and I have a lot of friends. We often play 2. together. I feel happy that I am a fish because I love swimming. My mother often tells me something about the sea. I hope I can swim to the sea one day. My motheris worried about me. She often warns me to be 3. . I know she is right. Mother loves me and I love her,too. These days the water of the river is 4. than before. People often throw the rubbish into the river. It's dangerous to live here. We have to 5. to the clean water, maybe to the sea. 查看答案
