任务型阅读

    A few months ago, a strange thing happened in my life. I heard a strange sound outside the window every night. I was scared and didn't know what to do. I thought there might be a thief standing outside the window was closed. I asked my parents to see what it was. But they didn't find anything. They thought it might be the wind. But I didn't think so.

    That lasted for a few days. I couldn't sleep well. Sometimes I even couldn't fall asleep, One day, I bought a flashlight(手电筒) in a market. At midnight, as soon as I heard the strange sound, I jumped out of my bed with the flashlight. I saw a black cat jumping up and down near thewindow. He might want to make friends with my pet cat, but he couldn't get into my house.

    Do you think it is strange? Have you ever had this kind of experience in your life?

⑴--⑷根据短文内容，回答问题⑸英译汉

通货膨胀和通货紧缩是两种截然不同的经济现象，但都会影响正常的经济秩序。从二者的共同点看，都是由________造成的

假定其他条件不变，在一般情况下，下列选项中与图中曲线DD′反映的变动关系相一致的是(　　)

入世贸组织十年来，我国的货物贸易进出口规模从2001年的5098亿美元扩大到2010年的近3万亿美元；我国人均国内生产总值从2001年的l038美元增长到2010年的4481美元；我国制造业进出口总额增长近5倍，汽车、船舶、铁路机车等技术含量和附加值较高的自主知识产权产品成为新的出口增长主体。事实说明
①不断提高对外贸易水平是经济发展的根本基点
②开放是经济全球化条件下加快发展的必由之路
③入世后我国促进经济增长主要依靠出口来拉动
④入世为我国全面建设小康社会提供了良好机遇

Na₂O₂具有强氧化性，H₂具有还原性，某同学根据氧化还原反应的知识推测Na₂O₂与H₂能发生反应。为了验证此推测结果，该同学设计并进行如下实验。

I.实验探究

步骤1：按如图所示的装置组装仪器（图中夹持仪器已省略）并检查装置的气密性，然后装入药品。

步骤2：打开K₁、K₂，在产生的氢气流经装有Na₂O₂的硬质玻璃管的过程中，未观察到明显现象。

步骤3：进行必要的实验操作，淡黄色的粉末慢慢变成白色固体，无水硫酸铜未变蓝色。