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阅读图文资料，完成下列要求。

长江三峡以西在远古时代属于古地中海，随着地壳不断运动，长江中游南半部隆起成陆地，古长江自东向西流入古地中海。约1.4亿年前，长江中游巫山山脉形成，古长江在其西侧向西流，在其东侧向东流。后来，随着青藏高原隆起，古地中海消失。距今300万年时，喜马拉雅山强烈隆起，巫山西侧长江流域地势整体抬升，巫山两侧河流溯源侵蚀进一步加剧，东侧河流成功袭夺（分水岭两侧，侵蚀力强的河流切穿分水岭抢夺侵蚀力较弱河流上游河段的现象）西侧，古长江东流而去，形成长江三峡雏形。第四纪，巫山山脉继续抬升，长江三峡峡谷（下图）最终形成。

(1)说明巫山山脉隆起对东侧河流成功袭夺西侧河流的作用。
(2)分析青藏高原隆起后对图示巫山以西的地貌、水文的影响。
(3)推测长江三峡峡谷未来变宽的必要条件

在正三棱柱中，，点满足，其中，，则（       ）

A．当时，的周长为定值

B．当时，三棱锥的体积为定值

C．当时，有且仅有一个点，使得

D．当时，有且仅有一个点，使得平面

假如你是李华，为了庆祝中华人民共和国成立70周年，你们学校举办了以“汉字之美”为主题的文化活动，请你邀请正在学习汉字的外国朋友Henry参加此次活动，帮助他学习汉字，了解中国文化。请你根据以下要点提示，用英文给你的朋友写一封邀请信。
1.活动时间地点；
2.活动内容，如观看汉字发展史电影，写古诗等。
3.参加活动的好处及学习汉语的重要性
注意：1. 120词左右；
2. 适当增加信息，使行文连贯；
3. 参考词汇：周年 anniversary 汉字 Chinese character
Dear Henry,
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours,

Li Hua

阅读下面短文,根据所给情节进行续写，使之构成一个完整的故事。

I grew up in a poor family with a single mom addicted to drugs (吸毒上瘾). Often there was no money for food, and I was always hungry.

On my eighth birthday, some close family members were invited to go to a park to celebrate my birthday. No cake. No presents. Except for my aunt, she had an envelope in her hand.

Before everyone sang Happy Birthday, I saw a little boy, probably my age, and a woman, perhaps his mother, digging in the park dustbin (垃圾箱) for food. Both the mother and the son were in rags (衣衫褴褛) with their clothes dirty enough not to tell the color of the clothes.

The sight of them filled me with sympathy. I begged my mom to invite them to my party but my mother was not a fan of strangers. She said no.

I was attracted by them. I didn’t know others struggled like me, and it hurt my heart. I watched them as everyone sang. I watched them as my aunt handed me the envelope. I watched them as I opened it until I saw the content, a new 100-dollar bill. My mother was angry be-cause my aunt gave me such a large amount of money. Maybe she thought my aunt trusted me more than her with cash.

We were poor and lived a hard life. But I had never dug in a dustbin for food. Again, I couldn’t help watching the mother and the son searching for food.

注意：
1．续写词数应为150左右；2．请按如下格式在答案卡的相应位置作答。
Paragraph 1:

I was watching them when I remembered my previous (以前的) life. Once I had a happy family with more than enough to eat and wear.

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Paragraph 2:

My memories of the past were interrupted by my aunt’s voice. My aunt kept talking over my mother, telling me that I could do ANYTHING I wanted with that money. So I did.

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

《淞南梦影录》记载开埠后的上海，“其中著名者，津馆则以庆兴为最，苏馆则以聚丰园为最。复新园来自白下，亦兼南北，烹饪绝精”；另据《中国近代对外贸易史资料》中记载，当时奉天地区的人们“自天津诸约成立后……商人努力推销，洋布销路，日有扩展”。这些记载可用于研究当时中国（     ）

A．民众饥饿问题得以解决	B．百姓的饮食结构发生根本改变
C．人们物质生活得以丰富	D．农产品商品化程度得到了提升

Space is where our future is — trips to the Moon, Mars and beyond. Most people would think that apart from comets (彗星) and stars, there is little else out there. 1． Scientists are now concerned that if we don’t clean it up, we may all be in great danger.

The first piece of space junk was created in the year of 1964, when the American satellite Vanguard I stopped operating. 2． However, since it kept orbiting around the Earth without any results, scientists became increasingly comfortable abandoning things that no longer served any useful purpose in space.

3． The junk varies from tiny pieces of paint chipped off rockets to cameras, huge fuel tanks, and even odd items like the million-dollar tool kit that astronaut Heidemarie Stefanyshyn Piper lost during a spacewalk.

The major problem with the space trash is that it may hit working satellites and damage travelling spaceship. In addition to this, many pieces of junk may crash with each other and break into pieces which fall back to the Earth. 4． Ground stations have been built to monitor larger pieces of space trash to prevent them from crashing into working satellites or space shuttles. 5． They will stop littering in space and to clean up the trash already there.

A．Future plans include a cooperative effort among many nations.

B．The junk floats slowly around the Earth.

C．However, since our space journey started, we have left much trash (垃圾) in space.

D．It is said that there are now over 500,000 pieces of man-made trash orbiting the Earth at speeds of up to 17, 500 miles per hour.

E．It lost its connection with the ground centre.

F．To avoid this, scientists have invented several ways for clearing the sky.

G．It hasn’t result in any serious problems up to now.

已知函数满足，有，且，当时，，则下列说法正确的是（       ）

A．是奇函数

B．时，单调递减

C．关于点对称

D．时，方程所有根的和为30

在锐角中，角的对边分别为，为的面积，且，则的取值范围为（       ）

A．

B．

C．

D．

已知函数.
(1)试讨论的单调区间；
(2)若有两个零点，求的取值范围.

设.
(1)若恒成立，求的最小值；
(2)若有2个极值点，且.
（i）求的取值范围；
（ii）证明：对一切正整数，恒有：.