下列有关实验现象的描述中,正确的是( )
A:蜡烛在氧气中燃烧,生成二氧化碳和水
B:铁丝在氧气中剧烈燃烧,火星四射,生成黑色固体
C:红磷在空气中燃烧,产生大量白雾,放出热量
D:木炭在氧气中燃烧产生明亮的黄色火焰
All the students p____ at the lecture were deeply touched by his success story.
读“南极地区图”,下列叙述正确的是( )
at the same school a difficult match from Room 205
i have a good friend called brett how about you