题目

根据括号中所给的汉语写出单词，使句子意思完整正确。 67. Don’t make any noise. The baby is          (睡着的) in the next room. 68. When you answer your teacher’s question, you should speak as          (清楚地) as possible. 69. I live on the          (第二十一) floor of a tall building in the centre of the city. 70. Last Saturday evening all of us enjoyed          (自己) at Sue’s birthday party.下面说法中，错误的是（ ）A．垃圾场里的大磁铁利用了电磁感应现象B．雷电的发生过程，伴随巨大的能量释放C．树上的苹果具有重力势能D．卢瑟福提出的原子核式结构模型