到2011年5月8日止，某铁路共运送旅客265．3万人次，用科学记数法表示265．3万正确的是(    )

把下列句子组成语意连贯的语段，排序最恰当的一项是（   ）

我在观赏一棵古松，我的心境是什么样的呢？

________________________________________________________________________

①在这个时候，我的实用的意志和科学的思考都完全失去作用，我没有心思去分别我是我，而古松是古松。

②因为我忘记古松和我是两件事，我就于无意之中把这种清风亮节的气概移置到古松上面去，仿佛古松原来就有这种性格。

③所以古松俨然变成一个人，人也俨然变成一棵古松。

④我的注意力完全集中在古松本身的形象上，我的意识之中除了古松的意象之外，一无所有。

⑤同时我又不知不觉地受古松的这种性格影响，自己也振作起来，模仿它那一副苍老劲拔的姿态。

⑥古松的形象引起清风亮节的类似联想，我心中便隐约觉到清风亮节所常伴着的情感。

用数学归纳法证明“1+$\frac{1}{2}+\frac{1}{3}+\cdots$+$\frac{1}{2^n-1}$＜n（n∈N^*，n＞1）”时，由n=k（k＞1）不等式成立，推证n=k+1时，左边应增加的项数是（　　）

Dear Grandma and Grandpa,

    I miss you so much. Thank you for the new bike! I'm so excited! How did you know 1 is my favorite color?

    When I first 2 the box under the Christmas tree, I didn't know what it was. I thought it was 3 small to hold a bike. Then when I opened it, I saw that the bike was in small pieces. That's 4 the box was small!

    Dad and I put them 5 the next day. It was a lot of fun. 6 we finished, I got on the blue bike and 7 around the town. My old bike was too small for me. This one is just 8. It looks great, too! All 9 friends want one like this now. Dad said that I could take my 10 when we go to visit you in the spring. I can't wait.

Yours,

David