题目

阅读下面短文，按照句子结构或上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。 Recently, a foreign student in China gave a very touching answer to the question: What should China be proud of? It was (wide) spread online. Emma is from Canada. She came to China four years ago. Now she is University student in Ningbo. The following is China in her eyes. ＂ (find) a job in China can be really simple. There are more job (chance) here than any other country in the world. ＂Its public security is great. I (travel) many 水是人类宝贵的自然资源，我们不仅要了解水还要爱护水（1）按图所示装置进行实验，一段时间后，理论上A试管中产生的气体与B试管中产生的气体的体积比为 ， 该实验过程中发生反应的化学方程式为 ． （2）生活中既能降低水的硬度又能杀灭水中病原生物的方法是 ．