根据短文理解，回答下列问题。

    The Internet is becoming more and more important in our life. How much do you know about it? What is the Internet? The Internet is a large, worldwide collection of computer networks. A network is a small group of computers put together. The Internet is many different networks from (A)                 the world. These networks are called the Internet. Once you have learned to use the Internet, you can have a lot of interest in the World Wide Web.

    What is the World Wide Web?

    The World Wide Web has been the most popular development of the Internet. The Web is like a big electronic book with millions of pages. These pages are called homepages. You can find information about almost anything in the world on these pages. For example, (B) you can use the Internet instead of a library to find information for your homework. You can also find information about your favourite sports or film stars, talk to your friends or even do some shopping on the Internet. Most pages have words, pictures and even sound or music.

    What is e-mail? (C)电子邮件是给别人发送信息的一种方法。 It's much quicker and cheaper than sending a letter. If you want to send e-mails, you must have an e-mail address. This address must have letters and dots(点 ) and an ‘@’( meaning ‘at'). This is what an address looks like: Emily @ star. net. Write a message, type in the person's e-mail address, and then send the message on the Internet. People don't need to use stamps, envelopes or go to the post office since the invention of the Internet. Quick. easy and interesting--that's the Internet!

    Hello! I'm Linda. I have a good e-friend. Her name is Zhang Yun. Her English name is Betty. She is a Chinese girl, but she lives in the UK with her parents. Her father is a doctor and her mother is a teacher. She is ten years old. She call me big sister. She is good at English. She likes Chinese and I also like Chinese. She likes singing and playing basketball. This is my good e-friend. Do you want to know more?

如图表示光照强度和温度与光合作用强度的关系，以下描述中错误的是（　　）

阅读下面的文字，完成下列各题。

漂流异邦的古代中国人

姚大力

    如果不把商亡后箕子东奔朝鲜的传说以及对“徐复东渡”结局的猜测算在内，今天可以确切地指出的最早漂流到今中国境外的我们的先人，就应当是西汉前期活动在“大宛”国（在今中亚费尔干纳盆地）的“秦人”了。据《史记·大宛传》，当西汉军队围攻大宛的国都时，这些“秦人”在被断绝了水源的围城之中帮助守军“穿井”。从司马迁在另一处提到为大宛等国“铸钱、器”的“汉使、亡卒降”来看，所谓“秦人”，很可能也是被匈奴战败俘掠、后来投奔大宛的西汉军人。降军中最有名的自然是李陵。华北汉地社会中也有人被掳掠、甚至逃亡到匈奴政权下去从事农业生产的。后者成为迄今所知为改变个人生存的经济环境而出走异国的最早的人群；因为在那里他们受到的盘剥较轻。两汉时因国内政治斗争的失败而出奔匈奴者亦时见于记载。自东汉末年以往，日本也逐渐成为中国政治流亡者远走高飞的一方天地。

    随着隋唐统一帝国的建立，古代中国人寓居他国的活动呈现某种新格局。由于隋唐政权对突厥和中亚国家持续的军事活动，大批士卒流失在西域固属难免。禁止汉族居民出家为僧的法令废弛后，汉族僧团的大规模膨胀导致西行求法或东渡弘法的高僧大德人数激增。除沿着陆上丝绸之路向西推进的商贾之家，通过海路移居东南亚的“唐人”，由唐经宋而入元，也代不乏人。到了元朝，中国移民在南洋群岛已经相当多了。

    东南沿海的中国人向外移民，从晚明的1560年代起逐渐形成一个高潮。明政府在这时开放海禁，使私人出海贸易的规模急剧扩大。但由于明政府仍明令禁止移民海外，遂使出门在外多年的人不敢归国，实际上对移民潮起到推波助澜的作用。17世纪前后，吕宋马尼拉的华人已有两三万人。清前期为孤立东南抗清力量，重新实行海禁，并对出国归来的人处以死刑，但其收效仍与明末禁止移民海外的政策略同。鸦片战争前，东南亚的华人总数高达一百万人。在19世纪下半叶，中国人向海外移民的范围更扩大到北美。大批中国人被当作“苦力”运送到美国，在西海岸为洋人开矿修路。

    明清两朝政府长期抱持敌视海外华人的立场，把他们当作化外“弃民”，视之为“无赖之徒”。海外华人在羁留地区遭遇暴虐或不公正待遇，“天朝”往往置若罔闻。直到清末，这样的政策才获得基本的调整。“华侨”的概念于是进入中国的政治文化。从光绪十九年（1893）“除华侨海禁”，到此后在各地设立领事馆，清政府终于对保护海外侨民的正当利益渐有意识。但在西方民族主义思潮的狂澜冲击之下，“满洲”政权的合法性已经无可挽救。海外的华侨成为推翻清统治的一种重要力量。

（摘编自姚大力《读史的智慧》）