题目

下列有关化学反应速率的说法不正确的是                                ( ) A．化学反应达到最大限度时，正逆反应速率也达到最大且相等 B．催化剂能降低化学反应的活化能，加快反应速率，提高生产效率 C．用锌和稀硫酸反应制取H2时，滴加几滴硫酸铜溶液能加快反应速率 D．用铁片和稀硫酸反应制H2比用98%的浓硫酸产生H2的速率快.阅读短文，从方框中选择适当的动词，并用其适当形式填空。有的需要加助动词或不定式符号（每词限用一次)。Once there was a king. He liked to write stories, but his stories1. not good. As people were afraid of him, they all said his stories were good.One day the king showed his stories to a famous writer. He waited the writer 2. compliments about stories. But the writer said his stories were so bad that they should 3. into fire. The king got very angry with him and sent him to prison(监狱).After some time, the king set him free. Again he showed him some of his new stories. “I 4. the stories for several weeks. What do you think of them this time?” the king asked.After reading them, the writer said, “I 5. back to prison again at once.”