1978年以后，我国进入社会主义现代化建设的新时期。请回答
（1）结合所学知识，指出导致图一粮食产量变化的政策因素。据图二说出国有企业改革的内容

（2）我国在对内改革的同时，对外开放也开始起步。三十年前，国家决定开放南通等14年沿海城市。结合所学知识，说一说国家作出这一决定的历史背景。
（3）我们家乡南通滨江临海、紧邻上海，经济发展的区位优势明显。请你结合上述区位优势，为南通今后的对外开放提出一项合理化建议。

要配制质量分数为20%的硫酸溶液,需用质量分数分别为60%、10%的硫酸溶液的质量比为（   ）

《辛丑条约》签订后，美国公使田贝说：“事实上，外国公使成为中国政府不可分割的一部分”，从而可以“任意斥责对待外国人不称职的中国官吏”。根据材料分析表明（    ）

根据短文理解，完成下了各题。

Dear Tom,

    I go on a trip to Beijing with my father Rick. On the first day, we visit (参观) the Palace Museum. It is in the centre of Beijing. There are many rooms in it. You can see “No photos!” in some places. If so, you need to follow the instructions (指示). On the second day, we visit the Summer Palace. It's great fun to boat there. I can swim, so I'm not afraid of water. Tomorrow we will go to the Great Wall.

I also make a new friend Tony who comes from Australia. When he leaves, he gives me his e-mail address and telephone number. After the six-day trip, we can go back to New York by plane. I hope to see you soon.

Bill