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纳米比亚西岸的纳米布沙漠是世界上最古老、最干燥的沙漠之一。该区城年降雨量不到25毫米,水汽来自夜间所形成的露水以及海雾。植物叶面的气孔在呼吸作用等气体代谢中成为空气和水蒸气的通路,有重要的生理作用,读下图纳来比亚及周边地区示意国完成下列各题。

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    Maybe you are aware that the latest job markets news isn't promising: Unemployment is still more than 9 percent, and new job growth has fallen close to zero, which is bad for economy, of course. And it may be especially discouraging if you happen to be looking for a job or hoping to change careers right now. But it actually shouldn't matter to you nearly as much as you think.

    That's because job growth numbers don't matter to job hunters as much as job turnover data. After all, existing jobs open up every day due to promotions, resignations, terminations, and retirements. In both good times and bad, turnover creates more openings than economic growth does. Even in June of 2007, when the economy was still falling along, job growth was only 132,000, while turnover was 4.7 million!

    And as it turns out, even today — with job growth near zero — over 4 million job hunters are being hired every month.

    I don't mean to imply that overall job growth doesn't have an impact on one's ability to land a job. It's true that if total employment were higher, it would mean more jobs for all of us to choose from. And it's true that there are currently more people applying for each available job opening, regardless of whether it's a new one or not.

    But what often distinguishes those who land jobs from those who don't is their ability to stay motivated. They're willing to do the hard work of identifying their valuable skills; be creative about where and how to look; learn how to present themselves to potential employers; and keep going, even after repeated rejections. The Bureau of Labor Statistics data showed that 2.7 million people who wanted and were available for work hadn't looked for a job within the last four weeks and were no longer even classified as unemployed.

    So don't let the headlines fool you into giving up. Four million people get hired every month in the U.S. You can be one of them.