为了探究蚂蚁喜欢吃什么样的食物，某生物兴趣小组做了如下实验：

①利用一个较大的玻璃槽器具，放入干湿适当的土壤，上面再覆盖一些蚁穴土壤．

②捕捉20只正常的蚂蚁置于玻璃槽内，在玻璃槽口盖上两层纱布．将上述实验装置放于适宜蚂蚁生活的环境中，进行饥饿处理1～2天．

③取两个大小、形状相同的培养皿，培养皿内分别放入等量碾成粉末状的白糖和食盐，摆放到玻璃槽内．

④3天后，称量培养皿中剩余食物的质量并记录，比较哪种食物减少的最多．

分析实验，请回答：

下列物质不可能是通过相应的金属跟稀酸发生置换反应制得的是（ ）

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1).每处错误及其修改均仅限一词。

2).只允许修改10处，多者（从第11处起）不计分。

    On December 10^th last year, we paid a visit of a high-tech agricultural garden. It took us one and a half hour to get there. The natural environment there was very pleased, and we could breathe fresh air. The intelligent glass greenhouse, where many kinds of fruits and vegetables were growing there, was really amazing. Though it was very cold outside, the greenhouse controlling by a computer could provide a proper temperature. That was also very interesting to be surrounded with different plants. We could see so many colorful fruits and vegetables in the greenhouse where all of us have never seen before. Luckily, we allowed to taste some of the fruits and vegetables. We really had the good time and learned a lot from the visit.

①从我国的基本国情出发制定的，绝不能动摇

②是党和国家的生命线，人民的幸福线

③核心内容是“一个中心，两个基本点”

④是我们党、我们国家生存发展的政治基石