题目

（2009.广东卷）  读写任务（共1小题，满分25分） 阅读下面的短文，然后按照要求写一篇150词左右的英语短文。 Jackie is perhaps the most easily annoyed koala（考拉）at the Featherdale Wildlife Park in southern Australia. All the koalas there are unhappy and complaining. You would be too if you were used to night activities and someone kept waking you up all day while you were trying to sleep it off. That’s right—sleep it off. The average koala is always half asleep because it feeds on the leaves of a special kind that makes it sleepy. The reason J7．元素周期律是学习和研究化学的重要工具，如表是元素周期表的一部分．请回答下列问题：（1）元素周期表中不同种元素最本质的区别是B（填序号）．A．相对原子质量不同   B．质子数不同   C．中子数不同（2）钠元素的原子结构示意图，则m=1，该原子在化学反应中易失去（填“得到”或“失去”）电子，说明元素的化学性与原子的最外层电子数关系密切．（3）元素周期表中每一个横行叫做一个周期，从表中可发现同一周期之间的排列的规律是从左到右，原子序数依次增加（只写一点）．