A:What do you think has happened to Tom
B:What do you think Tom has happened
C:Do you think what has happened to Tom
D:Do you think what Tom has happened
(2016•安庆)下列关于动物进化趋势的叙述中,不合理的一项是( )
学完《古代中国的政治制度》这一单元后,有四位同学分别撰写研究历史小论文,其中论文标题出现史实错误的是 ( )
下列物质在氧气中充分燃烧,有大量白烟产生的是()