根据以下资料，回答下列问题。
2008年末全国就业人员77480万人，比上年末增加490万人。其中，第一产业就业人员30654万人，占全国就业人员的39.6%；第二产业21109万人，占27.2%；第三产业25717万人，占33.2%。年末城镇就业人员30210万人，比上年末净增加860万人。其中，城镇单位就业人员12193万人，比上年末增加169万人。在城镇单位就业人员中，在岗职工11515万人，比上年末增加88万人。2008年末全国农民工总量为22542万人，其中外出农民工数量为14041万人。
2008年和2004年相比，第一产业的就业人数约下降了（）。
A．8%
B．13%
C．15%
D．无法计算
参考答案：B
解析：
2008年第一产业的就业人数为30654万人，2004年第一产业的就业人数为75200×46.9%=35268.8(万人)，下降的百分比为：(35268.8-30654)÷35268.8×100%≈13%。B项正确。
I had never noticed her. She was not the kind of girl who could draw attention. She was not tall and just looked . In class, she liked sitting at the back, reading or taking notes. One day I asked her to read aloud the text. When I heard her standard American pronunciation, I looked at her with new eyes. And I her name—Kelly. Later on, the National College Speech Competition would be held. One student in our school was allowed to attend. I thought it over and filled in name. Kelly practiced hard for the competition. However, I was a little worried because she was always too . Could she do well in the competition? On the night of the competition, I sat in the front row of the hall very early. I told her to take it easy. Her face turned red and she said nothing. It seemed she was really . I felt upset, but I just patted her on the shoulder and let her go to draw lots（抽签）. As a result, she drew No. 9 while No. 8 was a boy who was very good at giving speeches. Sure enough, No. 8 was very . The whole audience made a warm applause （鼓掌）almost every 30 seconds and was still talking about his speech with until Kelly appeared on the stage. I sat there with no to look at her. It was her first time to go up the stage, so I couldn’t be angry with her for any small mistakes. But at that moment, I found I was so afraid of her . The strong spotlight and large hall made her so small that nobody seemed to notice she had been on the stage. I felt hopeless. But the moment that me came. I clearly heard a voice, a very loud voice, “Now, please focus on（聚焦于）me.” Three times in all, louder and louder. The whole audience fell silent. I could believe that loud voice came from the girl, who was usually soft-voiced and didn’t attention at all. She gave a perfect speech. I think I will never forget this touching lesson that my student taught me — never underestimate（低估）the power of the silent people.
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