根据句意及汉语提示,完成句子。(1)Unfortunately, my car ____ down when I went home.(抛锚)(2)He looked at me in ____ . (惊讶)(3)____ (安全) is important.(4)Have you ____ of the romantic tale? (听说)(5)In his ____ (三十),he began to teach.
在烧瓶里放少量的碘,并且用酒精灯对烧瓶微微加热,过一会儿停止加热.在此实验中可以看到,固态的碘没有 ____,而直接变成紫色的碘蒸气,这种现象叫 ____,停止加热后,碘蒸气没有 ____,而直接就固态的碘,一部分附着在烧瓶壁上,这种现象叫 ____