下列有关燃烧的实验现象描述正确的是( )       A.硫在氧气中

下列有关燃烧的实验现象描述正确的是(  )

      A.硫在氧气中燃烧发出淡蓝色火焰

      B.木炭在空气中燃烧产生红色火焰,并放热

      C.红磷燃烧产生大量白雾

      D.铁在氧气中剧烈燃烧,火星四射,生成黑色固体,放热

答案

D

相关题目

下列做法中不可取的是 A.工业废水处理达标后循环使用 B.
下列做法中不可取的是 A.工业废水处理达标后循环使用 B.农业浇灌推广使用喷灌、滴灌技术 C.大量开采使用地下水        D.洗菜、淘米、洗衣
Kate won her first gold medal at the age of 7 . A.when it was 7B.when she wa
Kate won her first gold medal at the age of 7 . A.when it was 7B.when she was 7C.at 7D.when I was 7
You can________the word in the dictionary if you don't know it. A.give away
You can________the word in the dictionary if you don't know it. A.give away  B.look up  C.take after  D.cut off
为迎接2008年奥运会的召开,某中学准备开展以“弘扬人文精
为迎接2008年奥运会的召开,某中学准备开展以“弘扬人文精神,构建和谐校园”为主题的社会科学普及周活动。在中国古代传统文化中,最有利于建立“
水的状态除了气、液和固态外,还有玻璃态.它是由液态水
水的状态除了气、液和固态外,还有玻璃态.它是由液态水急速冷却到165K时形成的,玻璃态的水无固定形状,不存在晶体结构,且密度与普通液态水的
A characteristic of American culture that has become almost a tradition is to re
A characteristic of American culture that has become almost a tradition is to respect the self-made man — the man who has risen to the top through his own efforts, usually beginning by working with
——Can you go camping with me tomorrow?     ——_________. A.No, I don
——Can you go camping with me tomorrow?     ——_________. A.No, I don’t.        B.Sure.                      C.No, I can’t.        D.Let’s
如图所示,质量M=4 kg的滑板B静止放在光滑水平面上,滑板右
如图所示,质量M=4 kg的滑板B静止放在光滑水平面上,滑板右端固定一根轻质弹簧,弹簧的自由端C到滑板左端的距离,这段滑板与木块A之间的动摩擦因

最新题目