内环境稳态的维持，依赖于各个器官、系统的协调活动，而信息分子是它们之间的“语言”。据图分析，下列叙述错误的是(　)

中学生物学科兴趣小组在学习了“青蛙的生殖和发育”后，开展“各种污染物对青蛙受精卵孵化率的影响”的探究活动。

他们采集了一定数量的青蛙受精卵，以化肥、洗涤剂作为污染物，在鱼缸中进行实验观察。

 ①他们作出的实验假设是：各种污染物会降低青蛙受精卵孵化率。

 ②将3个鱼缸中加入等量的清水，并编号1、2、3；在1、2号鱼缸中分别加入一定量的化肥、洗涤剂。

 ③把青蛙受精卵分成三等份(各100粒)，分别放人上述鱼缸中，在相同适宜的环境中孵化。

回答下列问题：

阅读短文，根据其内容回答问题。
                                                                   English writer teaches us a lot about life
    Charles Dickens is a great British writer in the 19th century. Most of his books are still popular even today.
    In 1812, Charles Dickens was born in Portsmouth, England. Dickens didn't like playing with other boys when he was a little child, but he loved reading books. Childhood was not easy for Dickens. He began to work at a factory at the age of 12. Every day, he spent 10 hours washing bottles and cleaning shoes.
    When Dickens was 16, he became a reporter for a newspaper. During that time, Dickens wrote his first book, The Pickwick Papers. The book came out in 1836-37 and made Dickens rich and famous. His hard times were at an end.
    Most of Dickens' books are about the difficulties of living in Victorian England. The characters（人物）in his books are often children. They usually live a hard life in a boarding（寄宿）school, or have to work in a factory at a young age.
    However, Dickens' works are all about hope. He wrote sad and dark stories, but they are always filled with humor（幽默）. And most of his stories have happy endings, as with A Christmas Carol. It is about a selfish man. He finds love and friendship after looking back on his life one Christmas Eve.

侯氏制碱法的主要反应之一为：NaCl+CO₂+NH₃+H₂O═NaHCO₃↓+NH₄Cl，下面对该反应涉及的有关知识发表的部分见解，其中不正确的是（　　）