黄河·警示
<p>我国唐代诗人李白曾写道：“黄河之水天上来，奔流到海不复回”。</p><p><span word="Li">Li</span> <span word="Bai">Bai</span>, <span word="a">a</span> <span word="poet">poet</span> <span word="of">of</span> <span word="Tang">Tang</span> <span word="Dynasty">Dynasty</span> <span word="in">in</span> <span word="China">China</span>, <span word="once">once</span> <span word="wrote">wrote</span>, "<span word="the">the</span> <span word="water">water</span> <span word="of">of</span> <span word="the">the</span> <span word="Yellow">Yellow</span> <span word="River">River</span> <span word="rises">rises</span> <span word="in">in</span> <span word="the">the</span> <span word="sky">sky</span> <span word="and">and</span> <span word="flows">flows</span> <span word="to">to</span> <span word="the">the</span> <span word="sea">sea</span> <span word="without">without</span> <span word="returning">returning</span>.".</p><p>从地图上看，黄河干流像一个巨大的“几”字。</p><p><span word="From">From</span> <span word="the">the</span> <span word="map">map</span>, <span word="the">the</span> <span word="main">main</span> <span word="stream">stream</span> <span word="of">of</span> <span word="the">the</span> <span word="Yellow">Yellow</span> <span word="River">River</span> <span word="looks">looks</span> <span word="like">like</span> <span word="a">a</span> <span word="huge">huge</span> "<span word="several">several</span>" <span word="character">character</span>.</p><p>有人说：黄河是中华民族的母亲河，它为中华文明作出了巨大的贡献。也有人说：黄河是一条害河，它在历史上曾多次决口泛滥，给黄河流域的人民带来了深重的灾难。那么，我们将怎样看待黄河的呢。</p><p><span word="It">It</span> <span word="is">is</span> <span word="said">said</span> <span word="that">that</span> <span word="the">the</span> <span word="Yellow">Yellow</span> <span word="River">River</span> <span word="is">is</span> <span word="the">the</span> <span word="mother">mother</span> <span word="river">river</span> <span word="of">of</span> <span word="the">the</span> <span word="Chinese">Chinese</span> <span word="nation">nation</span>, <span word="which">which</span> <span word="has">has</span> <span word="made">made</span> <span word="great">great</span> <span word="contributions">contributions</span> <span word="to">to</span> <span word="Chinese">Chinese</span> <span word="civilization">civilization</span>. <span word="It">It</span> <span word="is">is</span> <span word="also">also</span> <span word="said">said</span> <span word="that">that</span> <span word="the">the</span> <span word="Yellow">Yellow</span> <span word="River">River</span> <span word="is">is</span> <span word="a">a</span> <span word="harmful">harmful</span> <span word="river">river</span>. <span word="It">It</span> <span word="has">has</span> <span word="burst">burst</span> <span word="and">and</span> <span word="overflowed">overflowed</span> <span word="many">many</span> <span word="times">times</span> <span word="in">in</span> <span word="history">history</span>, <span word="which">which</span> <span word="has">has</span> <span word="brought">brought</span> <span word="serious">serious</span> <span word="disasters">disasters</span> <span word="to">to</span> <span word="the">the</span> <span word="people">people</span> <span word="in">in</span> <span word="the">the</span> <span word="Yellow">Yellow</span> <span word="River">River</span> <span word="Basin">Basin</span>. <span word="So">So</span>, <span word="what">what</span> <span word="do">do</span> <span word="we">we</span> <span word="think">think</span> <span word="of">of</span> <span word="the">the</span> <span word="Yellow">Yellow</span> <span word="River">River</span>.</p><p>黄河流经地区，一般降水不足。黄河水，使一块块干涸的土地展现了生机。</p><p><span word="The">The</span> <span word="Yellow">Yellow</span> <span word="River">River</span> <span word="flows">flows</span> <span word="through">through</span> <span word="the">the</span> <span word="area">area</span>, <span word="and">and</span> <span word="the">the</span> <span word="precipitation">precipitation</span> <span word="is">is</span> <span word="generally">generally</span> <span word="insufficient">insufficient</span>. <span word="The">The</span> <span word="Yellow">Yellow</span> <span word="River">River</span> <span word="water">water</span> <span word="has">has</span> <span word="brought">brought</span> <span word="vitality">vitality</span> <span word="to">to</span> <span word="the">the</span> <span word="dry">dry</span> <span word="land">land</span>.</p><p>黄河的下游早有“地上河”之称！那“地上河”又是怎样形成的呢原来，黄河中游流经支离破碎，土层疏松的黄土高原，支流也比较多。由于黄土高原植被遭到破坏，一遇暴雨大量的泥沙与雨水一起，汇入黄河，使黄河成为全世界含沙量最多的河流。据观测，黄河仍以平均每年10厘米的速度向上升高。黄河之害，在于下游决口改道。因为大量泥沙入河并在下游河道沉积。黄河泥沙百分之九十来自中游，因此，加强中游黄土高原地区的水土保持是治黄的根本。</p>
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