题目

如图所示，烧瓶中的水刚停止沸腾，现将注射器的活塞向外拉，观察到的现象是，这个现象说明水的沸点与有关；若倒置，应在瓶底浇水（冷/热），才能使烧瓶中的水重新沸腾。 答案：【1】水再次沸腾【2】气压【3】冷从方框中选用合适的词并用其适当形式填空。 radio   wide   excite  high   we 1.How ___________ it was to hear that some pop stars would come to our town. 2.The micro letter is used ___________ in China. It has over 300 million users. 3.— Mary, could you tell me who invented ___________? — A team of scientists, John Bardeen, Walter Brattain and William Shockley. 4.Do you know what the ___________ of the tower is? About twenty metres. 5.We enjoyed ___________ trip to the Statue of Liberty very much. What great fun we had!