题干

设数列的前n项和为,令,称为数列,……,的“理想数”,已知数列,……,的“理想数”为2004,那么数列2, ,……,的“理想数”为(    )

A:2008

B:2004

C:2002

D:2000

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答案(点此获取答案解析)

C

同类题1

阅读下面的文言文,完成文后各题。
(一)
    嗟乎!师道之不传也久矣!欲人之无惑也难矣!古之圣人,其出人也远矣,犹且从师而问焉;今之众人 , 其下圣人也亦远矣,耻学于师。是故圣益圣,愚益愚。圣人之所以为圣,愚人之所以为愚,皆出于此乎?爱其子,择师而教之,于其身也,则耻师焉,惑矣!彼童子之师,授之书而习其句读者,非吾所谓传其道解其惑者也。句读之不知,惑之不解,或师焉,或不焉,小学而大 , 吾未见其明也。巫医乐师百工之人,不耻相师;士大夫之族,曰师曰弟子云者,则群聚而笑之。问之,则曰:彼与彼年相若也,道相似也。位卑则足羞,官盛则近谀。呜呼!师道之不复可知矣!巫医乐师百工之人,君子不齿,今其智反不能及,其可怪也欤!
(选自韩愈《师说》)
(二)
    二十一日,宗元白:辱书云欲相师,仆道不笃,业甚浅近,环顾中,未见可师者。虽常好言论,为文章,甚不自是也。不意吾子自京师来蛮夷间,幸见取。仆自卜,固无取,假令有取,亦不敢为人师。为众人师且不敢,况敢为吾子师乎?
    孟子称“人之患在好为人师”。由魏、晋氏下,人益不事师。今之世,不闻有师,有辄哗笑之,以为狂人。独韩愈奋不顾流俗,犯笑侮,收召后学,作《师说》,因抗颜而为师。世果群怪聚骂,指目牵引,而增与为言辞。愈是得狂名,居长安,炊不暇熟,又挈挈东,如是者数矣。
(选自柳宗元《答韦中立论师道书》)

同类题4

阅读下面短文,从短文后各题所给四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    I went to a dinner party at a friend's home last weekend and met her five-year-old daughter for the first time. Little Maya was all curly brown hair, dark eyes, and lovely 1 her shiny pink nightgown ( 睡裙) .I wanted to say, “Maya, you're so2!

    Turn around and model that pretty gown for me. You're beautiful!” But I didn't.

    “Maya,” I said,3into her eyes, “it's very nice to meet you.”

    “ Nice to meet you, too.” She said, in that4, talking-to-adults, good girl voice.

    “Hey, what are you reading?” I asked. Her eyes got bigger, and the practiced, polite facial 5gave way to real excitement over this6. But she seemed too7 to answer me.

    “I love books,” I said. “Do you?”

    Most8do.

    “Yes,” she said. “And I can9them all by myself now!”

    “Wow,10!” I said. And it is, for a five-year-old.

    “What's your favourite book?” I asked.

    “I'll go and get it! Can I read it to you?”

    Purplicious was Maya's11, and a new one to me, as she sat next to me and12read aloud every word. Then I told her that I'd just13a book, and that I hoped she'd write one, too, one day. She was crazy14 that idea. We were both sad when Maya had to go to bed,15I told her next time to choose another book and we'd read it.

    Try this the next time you meet a little girl. She may be16and unsure at first, because few people ask her about her17, but be patient and stick with it. Ask her what she's reading. What does she like and dislike, and why? You're just18 an intelligent (明智的) conversation that respects her brain. Tell her about your19 and accomplishments, and your favourite books. Set a good example for her of what a 20woman says and does.