阅读材料，完成下列问题。
材料一广西壮族自治区主要河流分布图
材料二广西矿产资源种类繁多，素称“有色金属之乡”。广西铝土矿探明储量在1亿吨以上，其中平果铝土矿占广西铝储量的78％以上，可以露天开采，是我国目前最好的富铝矿。
材料三“天坑”是四周皆被刀削似的悬崖绝壁所围，形成一个巨大的竖井，底部有地下河相通。乐业天坑群位于中国广西乐业县，占地约20平方千米。地质调查发现，乐业天坑群所在地区为石灰岩分布区。
(1)简述该省区河流水文特征。
(2)根据材料提供的信息，分析广西发展炼铝工业的有利区位条件。
(3)说明乐业天坑群形成的地质作用过程。
(1)水量丰富；汛期长；流量季节变化大；水能丰富；含沙量小；无结冰期。 (2)铝土资源丰富(储量大)；品质好(富铝矿)；开采方便(可以露天开采)；水能丰富、电力充足。
(3)经沉积成岩作用形成石灰岩，石灰岩经地壳抬升成陆地，经流水侵蚀、溶蚀形成巨大地下溶洞，年深日久，溶洞由重力坍塌成天坑。
我国保护少年儿童权益的专项法律是《中华人民共和国未成年人保护法》。（ ）
根据以下材料，回答题
If you don′t think a phone is the rightgift for a lover, the smart choice this year is a smart phone.
For people who don′t read instructions
The easiest-to-use phone is the iPhone. It′sthat has pushed it to the No.1 selling position, surpassing the Motorola Razr.The iPhone′s touch screen is easy to operate and it′s also easy to customize (用户化). The iPhone can run allsorts of applications such as those help you to lose weight, identify a song onthe radio, find a restaurant or do many other things.
For the futurist
The T-Mobile G1 is very popular as it is thefirst phone to offer a Google browser, meaning that you′re getting the real webon your phone, but it′s the phone′s potential that qualifies it for the futurist.The exciting applications are interesting, but they don′t always work smoothly.Sometimes it is hard to use the applications it comes with. The system shouldimprove as it becomes more popular, so it holds great promise. With fewrestrictions on the design of applications for the phone,
the G1 could be the first phone toincorporate (整合) some of the coolest.
For the road warrior
The new BlackBerry Storm is something likethe equivalent (等同物) of a mullet--a business up front, party in the back. It stillincorporates the serious mail and organization features that have endeared (使受钟爱) these phones to business people. The 3.25-inch is bright anddetailed and it′s a decent size for watching videos on the go.
For the Luddite (反对技术进步的人)
For those who can′t handle buttons and newfeatures, there is the Samsung Jitterbug Dial. Some people are Luddites whojust want a few large buttons to make calls. That′s it, just calls. That makesit even easier to use an iPhone.
What would be the best title forthe passage (no more than 6 words)
________________________________________________________________________
简述学生的义务。
依据《普通高中英语课程标准》，语言有丰富的文化内涵。教师应根据学生的年龄特点和__________ ，逐步扩展文化知识的内容和范围。
（ ）提出了一个教师成长公式：经验+反思=成长。
（ ）、同龄人的交流、儿童的养育实践、教育与文化是影响儿童道德发展的主要因素。
恩格斯评论一位法国人是“德国革命原理的传播者，旧的封建社会的摧毁人”。恩格斯评论的是__________。
加涅认为复述不仅能有利于保持信息以便进行编码，也能增加短时记忆的容量。( )
聚合思维
一般而言，学习动机越强，学习效果越好。()
