What's the most important thing for you to have in your life? Somebody says hard-work, others suggest knowledge, love and luck.
    If you arrange the 26 English letters alphabetically(按字母表的顺序) and use numbers to represent each of them, for example, 1 for a, 2 for b, 3 for c…, you can change an English word into a number. So hard-work becomes 8+1+18+4+23+15+18+11="98," meaning 98 is its mark; knowledge: 11+14+15+23+12+5+4+7+5="96," while love :12+15+22+5="54," and luck: 12+21+3+11="47," a small mark. None of these words can give one a full mark. What about money or prayer(祈祷)? They can't , either.
    Then what else? Don't be worried. You can always find an answer to a problem in your life, when you change your way of looking at things or doing things, or your attitude. Yes, attitude is the word. See for yourself: attitude: 1+20+20+9+20+21+4+5="100," a full mark.
    Different attitudes lead to different ways of life. Most times people hope for a better life. It is possible that you will have a change for the better after you have changed your attitude.
    When you change your manner and become friendly towards others, you'll meet more smiling faces. In the same way, if you take a positive(积极地) attitude towards failure(失败), you’ll find you may have more chances to succeed.

阅读下面的文章，完成文后各题。

    蒋贵，字大富，以燕山卫卒从成祖起兵。积功至昌国卫指挥同知。从大军征交阯及沙漠，迁都指挥佥事，掌彭城卫事。

    宣德二年，四川松潘诸番叛，充右参将，从总兵官陈怀讨之。募乡导，绝险而进，薄其巢。一日十数战，大败之。进都指挥同知，镇守密云。七年复命为参将，佐怀镇松潘。明年进都督佥事，充副总兵，协方政镇守。又明年，诸番复叛，政等分道进讨。贵督兵四千，攻破任昌大寨。会都指挥赵得、宫聚兵以次讨平龙溪等三十七寨，斩首一千七百级，投崖坠水死者无算。捷闻，进都督同知，充总兵官，佩平蛮将军印，代政镇守。

    英宗即位，以所统皆极边地，奏增军士月粮。正统元年召还，为右都督。阿台寇甘、凉，边将告急。命佩平虏将军印，帅师讨之。贼犯庄浪，都指挥江源战死，亡士卒百四十余人。侍郎徐晞劾贵，朝议以贵方选军甘州，势不相及。而庄浪乃晞所统，责晞委罪。置贵不问。

    明年春，谍报敌驻贺兰山后。诏大同总兵官方政、都指挥杨洪出大同迤西，贵与都督赵安出凉州塞会剿。贵至鱼儿海子，都指挥安敬言前途无水草，引还。镇守陕西都御史陈镒言状，尚书王骥出理边务，斩敬，责贵立功。贵感奋，会朵儿只伯惧罪，连遣使入贡，敌势稍弱。贵帅轻骑败之于狼山，追抵石城。已，闻朵儿只伯依阿台于兀鲁乃地，贵将二千五百人为前锋往袭。副将李安沮之，贵拔剑厉声叱安曰：“敢阻军者死！”遂出镇夷。间道疾驰三日夜，抵其巢。阿台方牧马，贵猝入马群，令士卒以鞭击弓韣（dú弓袋）惊马，马尽佚。敌失马挽弓步斗贵纵骑蹂击指挥毛哈阿奋入其阵大败之复分军为两翼别遣百骑乘高为疑兵转战八十里。会任礼亦追敌至黑泉，阿台与朵儿只伯以数骑远遁，西边悉平。

    十四年正月，贵卒，年七十。赠泾国公，谥武勇。

美国在2003年对伊拉克战争中，不顾全世界人民的反对投放了大量的贫铀弹，贫铀弹中的铀元素核电荷数为92，相对原子质量为238，则它的核内质子数为____ ，核外电子数为____ ，若已知在数值上，相对原子质量等于质子数与中子数之和，则该铀原子核内中子数为____ ．

1956年，***为处理与民主党派的关系而提出的方针是（  ）

若角α的终边经过点P（1，﹣2），则tanα的值为（　　）