视点坐标（Eye coordinates）

写出下列反应的文字表达式，指出化学反应基本类型

（1）铁丝燃烧                                           ，                              ；

（2）在空气中加热铜丝                                    ，                     ；

（3）双氧水和二氧化锰混合                                        ，                           ．

On my eighth birthday, Dad bought me an accordion(手风琴） and said excitedly, "Once you learn to play, it’ll stay with you for life." But I didn’t want to play it. Ijust wanted to play games, But Dad asked me to take accordion lessons.

One day, I found a box in a corner. When I opened it, I saw a beautiful violin. "You’re your father’s," Mum said. "His parents bought it for him. I guess he got too busy on the farm to learn to play it."

I had to practice half an hour every day, and every day I tried to get out of it. But Dad didn’t allow. I asked why. He answered, "Because you can bring people joy. You can touch their hearts." He added softly, "Someday you’ll have the chance I never had: you’ll play beautiful music for your family. And you’ll understand why you’ve worked so hard." I was speechless.

The lessons stopped after I finished high school. When I grew up, I got married and moved into a new house. I put the accordion in the attic（阁楼）.

One afternoon, my two children found the accordion by accident (偶然). They got very excited. "Play it. Play it," they laughed and said. I started to play some simple songs. I was surprised I could still remember them. Soon the kids were dancing. Even my wife was laughing and clapping to the beat.

At that moment, my father’s words came back to me, "Someday you’ll have the chance I never had. And you’ll understand." I finally knew why Dad had asked me to practice hard. Dad never learnt to play his violin. But I told my family, "This is my father’s music."

小题1:My father didn’t learn to play his violin when he was young because _______.

A．he didn’t like to play the violin

B．he had to support his family

C．he wanted to play games

D．he didn’t keep on practicing小题2:How might the writer feel when he had to practice playing the accordion?

A．Delighted.

B．Excited.

C．Bored.

D．Relaxed.小题3:"Dad didn’t allow" means "_______".

A．Dad didn’t let me do it.

B．Dad didn’t stop me doing it.

C．Dad didn’t help me do it.

D．Dad didn’t see me do it.小题4:Dad asked me to learn to play the accordion so that _______.

A．I could go to a better school

B．I could give myself much joy

C．I could be a useful man

D．I could make people happy

阅读下面短文，回答下 * * 道题。
2001年3月15日，北京大学教授于希贤来到抚仙湖，并组织考察组乘坐潜水器潜入湖底。他们利用声呐技术在水深15m处发现第一个目标。有一堵石墙，石料大小不一，每个石块上至少有一面到两面是平整的，带有人工加工过的痕迹。从声呐图上可以看到，该建筑区还具有中轴线和类似普通城市里的“一般居民居住区”。从建筑特点看，它们带有明显的当地黎族的古代建筑风格。没有多久，声呐图上又发现新的目标。潜水器掉头搜寻，发现了一大片呈正南北向建造的建筑群落。群落不大，但石料加工更精细。石料三面都有加工的痕迹，十分平整精细，另外所有散落的石块都是有序排列的。这一区域还有数米宽的南北向石板大道。从这些可以看出，那个时代有相当高的文化水准。于教授推测，这里可能是古城的“富人区”。绕过石质城墙后，便是所谓的“贫民区”。
于教授说，通过对湖周围地区地理地质环境的考察和比较，可以肯定这座古城是在一次巨大的自然灾害中陷落湖底的。该建筑群依山傍水，位于小江断裂带西支的深断裂带上。公元110年东汉时期这里曾经发生过一次大地震。于教授还说，尽管古城的年代还需要进一步确定，但是有一点可以肯定——抚仙湖底确实有一座陷落的古滇时期建筑群落，且已经初具城市功能，因为具有不同级别的建筑群是判断能否构成城市的重要指标。该遗址面积有2.4km²，比世界著名的“庞贝古城”还要大。由于水下考察时没有发现任何动植物残骸及陶瓷、砖瓦的残片，这给探测年代带来了相当的困难，但从水下建筑群石料的打制方式来看，湖中古城与滇中发现的长城颇为相似，应与其处于同一时代，即距今约两千年。

文中认为“那个时代有相当高的文化水准”，不能作为这一观点依据的一项是______。

A．石块堆放整齐

B．数米宽的南北向石板大道

C．石料三面都有加工的痕迹，十分平整精细

D．建筑群带有明显的当地黎族的古代建筑风格

崔健的摇滚乐自成特点，以下描述不符合这些特点的是（）

A、桀骜不驯

B、温情脉脉

C、声音具有破坏性

D、冲破束缚的渴望

下列各项中，按照增值税法律制度的有关规定，不得开具增值税专用发票的有( )。

A．在境外销售应税劳务

B．销售报关出口的货物

C．将自产货物用于集体福利

D．转让非专利技术