古诗词积累。
①子曰：“                            ，思而不学则殆。”(《论语·为政》)
②                              ，直挂云帆济沧海。（李白《行路难》）
③潮平两岸阔，                           。（王湾《次北固山下》）
④                           ，浅草才能没马蹄。（白居易《钱塘湖春行》）
⑤春蚕到死丝方尽，                            。（李商隐《无题》）
⑥                             ，人不寐，将军白发征夫泪。（范仲淹《渔家傲·秋思》）
⑦蒹葭萋萋，                       。所谓伊人，                         。（《诗经·蒹葭》）
⑧辛弃疾《破阵子·为陈同甫赋壮词以寄之》一词中道出了封建年代无数文臣武将共同宏愿的诗句是：                              ，                              。

____是制造铅笔芯的主要原料。

经国务院批准，第六届国际数字地球会议于2009年9月9日～12日在北京召开，本届大会将以“行动中的数字地球”为主题。围绕数字地球理论、技术研究及其应用等方面展开交流与讨论，旨在通过国际学术交流、促进数字地球在国民经济和社会可持续发展、环境保护、灾害治理、自然资源与世界遗产保护等储多方面发挥重要作用。回答：

数字地球实现以后，科学家们可以（  ）

通读下面短文，掌握其大意，然后在每小题所给的四个选项中，选出一个最佳答案，并将答题卡上对应的选项涂黑.

    I'm sure many people are working hard for a lot of money, a big house, a new car, expensive clothes and so on. Those are considered to be symbols of 1 on the material level. When I was young, I was also 2 reaching for material success. So I chose a job as a salesman and I did make some pretty good money.

    But later I realized that was not what I wanted, because I was often forced to sell products that might not be good for customers. I become very unhappy 3 I could make a lot of money. I no longer felt proud of my job and even 4 myself for doing things like that. So I 5 my job and took another job, this time helping people 6 the poor and the weak. The sense of belonging was great and suddenly I felt successful in my life again，I made less money but I was 7 with myself.

    For my own past, success comes from the feeling of satisfaction and joy. I feel successful when I love what I do, not caring so much about 8. And I feel the most successful when I 9 my kindness everywhere go.

    So, be 10 to yourself: learn to listen to the voice from the bottom of your heart. And find your own way with a happy heart to achieve your own success.