题目

句型转换，按照要求改写下列句子。 （1） It is widely believed that the four men have been killed by the accident.(改成以the accident作主语） （2） Many people were buried alive.The city was buried alive too. (合并成一句,并用so引导） （3） It turned out that the man was not as brave as he had been expected. (改成以as引导的非限制性定语从句） （4） The days when women were looked down upon are gone.(改成倒装句） （5） There are many problems that remain to be solved.(改成非谓语动词结构 把SO2、Cl2分别通入紫色石蕊试液中各有什么现象？如果把SO2和Cl2按物质的量比为1∶1组成的混合气体通入紫色石蕊试液中可能有什么现象？