us/cm是什么单位 us/cm的电导率的单位
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\u7535\u5bfc\u7387\uff08conductivity\uff09\u662f\u7528\u6765\u63cf\u8ff0\u7269\u8d28\u4e2d\u7535\u8377\u6d41\u52a8\u96be\u6613\u7a0b\u5ea6\u7684\u53c2\u6570\u3002\u5728\u516c\u5f0f\u4e2d\uff0c\u7535\u5bfc\u7387\u7528\u5e0c\u814a\u5b57\u6bcd\u03ba\u6765\u8868\u793a\u3002\u7535\u5bfc\u7387\u03c3\u7684\u6807\u51c6\u5355\u4f4d\u662f\u897f\u95e8\u5b50/\u7c73\uff08\u7b80\u5199\u505aS/m\uff09\uff0c\u4e3a\u7535\u963b\u7387\u03c1\u7684\u5012\u6570\uff0c\u5373\u03c3=1/\u03c1\u3002
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\u8fd9\u4e2a\u89c4\u5219\u4e5f\u9002\u7528\u4e8e\u8bb8\u591a\u4f4e\u9891\u7387\u7684\u4ea4\u6d41\u7535\u7cfb\u7edf\uff0c\u5982\u5bb6\u5ead\u7535\u8def\u3002\u5728\u4e00\u4e9b\u4ea4\u6d41\u7535\u7535\u8def\u4e2d\uff0c\u5c24\u5176\u662f\u5728\u9ad8\u9891\u7535\u8def\u4e2d\uff0c\u60c5\u51b5\u5c31\u53d8\u5f97\u975e\u5e38\u590d\u6742\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u7cfb\u7edf\u4e2d\u7684\u7ec4\u4ef6\u4f1a\u5b58\u50a8\u548c\u91ca\u653e\u80fd\u91cf\u3002
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\u5229\u7528\u7535\u5bfc\u7387\u4eea\u6216\u603b\u56fa\u4f53\u6eb6\u89e3\u91cf\u8ba1\u53ef\u4ee5\u95f4\u63a5\u5f97\u5230\u6c34\u7684\u603b\u786c\u5ea6\u503c\uff0c\u5982\u524d\u8ff0\uff0c\u4e3a\u4e86\u8fd1\u4f3c\u6362\u7b97\u65b9\u4fbf\uff0c1\u03bcs/cm\u7535\u5bfc\u7387 = 0.5ppm\u786c\u5ea6\u3002\u7535\u5bfc\u7387\u662f\u7269\u8d28\u4f20\u9001\u7535\u6d41\u7684\u80fd\u529b\uff0c\u4e0e\u7535\u963b\u503c\u76f8\u5bf9\uff0c\u5355\u4f4dSiemens/cm (S/cm)\uff0c\u8be5\u5355\u4f4d\u768410-6\u4ee5\u03bcS/cm\u8868\u793a\uff0c10-3\u65f6\u4ee5mS/cm\u8868\u793a\u3002 \u4f46\u662f\u9700\u8981\u6ce8\u610f\uff1a
\uff081\uff09\u4ee5\u7535\u5bfc\u7387\u95f4\u63a5\u6d4b\u7b97\u6c34\u7684\u786c\u5ea6\uff0c\u5176\u7406\u8bba\u8bef\u5dee\u7ea620-30ppm\u3002
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\uff083\uff09\u91c7\u7528\u8bd5\u5242\u68c0\u6d4b\u53ef\u4ee5\u83b7\u53d6\u6bd4\u8f83\u51c6\u786e\u7684\u6c34\u7684\u786c\u5ea6\u503c\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u7535\u5bfc\u7387
us\u548ccm\u4e2d\uff0c\u3010s\u3011\u662f\u7535\u5bfc\u7684\u5355\u4f4d\uff0c\u8bb0\u4f5c\u201c\u897f\u95e8\u201d,S=1/\u03a9\uff1b
\u03bc \u662f\u5e0c\u814a\u5b57\u6bcd\uff0c\u8868\u793a10\u7684\u8d1f6\u6b21\u65b9\uff0c\u8bfb"\u5fae"\uff0cus/cm\u8bb0\u4f5c\u201c\u5fae\u897f\u95e8\u6bcf\u5398\u7c73\u201d\uff0c\u662f\u7535\u5bfc\u7387\u7684\u5355\u4f4d\u3002
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\u7535\u5bfc\u7387\uff08total dissolved solids\uff09\u7b80\u79f0\u4e3a\uff1aT.D.S\u3002\u7535\u5bfc\u7387\u662f\u7269\u4f53\u4f20\u5bfc\u7535\u6d41\u7684\u80fd\u529b\u3002\u7535\u5bfc\u7387\u6d4b\u91cf\u4eea\u7684\u6d4b\u91cf\u539f\u7406\u662f\u5c06\u4e24\u5757\u5e73\u884c\u7684\u6781\u677f\uff0c\u653e\u5230\u88ab\u6d4b\u6eb6\u6db2\u4e2d\uff0c\u5728\u6781\u677f\u7684\u4e24\u7aef\u52a0\u4e0a\u4e00\u5b9a\u7684\u7535\u52bf\uff08\u901a\u5e38\u4e3a\u6b63\u5f26\u6ce2\u7535\u538b\uff09\uff0c\u7136\u540e\u6d4b\u91cf\u6781\u677f\u95f4\u6d41\u8fc7\u7684\u7535\u6d41\u3002\u6839\u636e\u6b27\u59c6\u5b9a\u5f8b\uff0c\u7535\u5bfc\u7387(G)--\u7535\u963b(R)\u7684\u5012\u6570\uff0c\u662f\u7531\u7535\u538b\u548c\u7535\u6d41\u51b3\u5b9a\u7684\u3002
\u7535\u5bfc\u7387\u7684\u57fa\u672c\u5355\u4f4d\u662f\u897f\u95e8\u5b50\uff08S\uff09\uff0c\u539f\u6765\u88ab\u79f0\u4e3a\u59c6\u6b27\uff0c\u53d6\u7535\u963b\u5355\u4f4d\u6b27\u59c6\u5012\u6570\u4e4b\u610f\u3002\u56e0\u4e3a\u7535\u5bfc\u6c60\u7684\u51e0\u4f55\u5f62\u72b6\u5f71\u54cd\u7535\u5bfc\u7387\u503c\uff0c\u6807\u51c6\u7684\u6d4b\u91cf\u4e2d\u7528\u5355\u4f4d\u7535\u5bfc\u7387S/cm\u6765\u8868\u793a\uff0c\u4ee5\u8865\u507f\u5404\u79cd\u7535\u6781\u5c3a\u5bf8\u9020\u6210\u7684\u5dee\u522b\u3002\u5355\u4f4d\u7535\u5bfc\u7387\uff08C\uff09\u7b80\u5355\u7684\u8bf4\u662f\u6240\u6d4b\u7535\u5bfc\u7387\uff08G\uff09\u4e0e\u7535\u5bfc\u6c60\u5e38\u6570(L/A)\u7684\u4e58\u79ef.\u8fd9\u91cc\u7684L\u4e3a\u4e24\u5757\u6781\u677f\u4e4b\u95f4\u7684\u6db2\u67f1\u957f\u5ea6\uff0cA\u4e3a\u6781\u677f\u7684\u9762\u79ef\u3002=\u03c1l=l/\u03c3
(1)\u5b9a\u4e49\u6216\u89e3\u91ca \u7535\u963b\u7387\u7684\u5012\u6570\u4e3a\u7535\u5bfc\u7387\u3002\u03c3=1/\u03c1
(2)\u5355\u4f4d:\u5728\u56fd\u9645\u5355\u4f4d\u5236\u4e2d,\u7535\u5bfc\u7387\u7684\u5355\u4f4d\u662f\u897f\u95e8\u5b50/\u7c73\u3002
(3)\u8bf4\u660e \u7535\u5bfc\u7387\u7684\u7269\u7406\u610f\u4e49\u662f\u8868\u793a\u7269\u8d28\u5bfc\u7535\u7684\u6027\u80fd\u3002\u7535\u5bfc\u7387\u8d8a\u5927\u5219\u5bfc\u7535\u6027\u80fd\u8d8a\u5f3a,\u53cd\u4e4b\u8d8a\u5c0f\u3002
cm：厘米
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绛旓細us鐢ㄨ嫳璇浣滐細鑻盵ʌs]锛岀編[ʌs]銆傜煭璇惌閰嶏細all of us.鎴戜滑鍏ㄤ綋锛涙垜浠墍鏈変汉锛涙垜浠兘銆俹ne of us.鑷繁浜恒俵et us say.(鎻愯鎴栦妇渚嬫椂)璀璇达紝姣旀柟璇达紝渚嬪銆倁s and them.鎴戜滑鍜屼粬浠紱鑷繁浜哄拰闈炶嚜宸变汉銆倀hat makes two of us.鎴戜篃鏄姝わ紱瀵规垜鍚屾牱閫傚簲銆倀ill death us do pa...
绛旓細鎬荤粨锛 "Us" 鏄竴涓唬璇嶏紝鐢ㄤ簬琛ㄧず "鎴戜滑" 杩欎釜缇や綋鐨勬垚鍛樹綔涓哄璇紝鑰 "our" 鏄竴涓舰瀹硅瘝鎬х墿涓讳唬璇嶏紝鐢ㄤ簬淇グ琛ㄧず "鎴戜滑" 杩欎釜缇や綋鎷ユ湁鐨勪簨鐗┿
绛旓細us鏄編鍥界殑绠绉般US鏄疷nited States鐨勭缉鍐欙紝鐩存帴缈昏瘧涓衡滃悎浼楀浗鈥濄備笘鐣屼笂鏈変袱涓悎浼楀浗锛氱編鍒╁潥鍚堜紬鍥藉拰澧ㄨタ鍝ュ悎浼楀浗锛屼絾鏄竴鑸儏鍐典笅锛屸滃悎浼楀浗鈥濊繖涓瘝鐗规寚缇庡埄鍧氬悎浼楀浗锛屼篃灏辨槸缇庡浗銆傜編鍥戒綅浜庡寳缇庢床涓儴锛屽寳涓庡姞鎷垮ぇ鎺ュ￥锛屽崡闈犲ⅷ瑗垮摜婀撅紝瑗夸复澶钩娲嬶紝涓滄繏澶цタ娲嬶紝 鎬婚潰绉937涓囧钩鏂瑰崈绫筹紝娴峰哺绾块暱22680...
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绛旓細US鏄痷nited states 鐨勭缉鍐欙紝鎸囩編鍥姐 缇庡浗鐨勫叏绉版槸THE UNITED STATES OF AMERICA锛岀缉鍐欎负USA銆 涓鑸畝绉颁负united states锛岀缉鍐欎负US銆傜編鍥芥槸鐢卞崕鐩涢】鍝ヤ鸡姣斿浜氱壒鍖恒50涓窞鍜屽叧宀涚瓑浼楀娴峰缁勬垚鐨勮仈閭﹀叡鍜岀珛瀹埗鍥藉銆傜編鍥芥槸涓涓珮搴﹀彂杈剧殑璧勬湰涓讳箟鍥藉銆傚崕鐩涢】鏄編鍥界殑棣栭兘銆
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绛旓細1. US鍜孶SA閮芥槸瀵圭編鍥界殑鑻辨枃缂╁啓銆"US"鏄"United States"鐨勭缉鍐欙紝鐩磋瘧涓衡滃悎浼楀浗鈥濄"USA"鏄"United States of America"鍏ㄧО鐨勭缉鍐欙紝浣嗗湪浣跨敤涓婏紝"US"鏇翠负鏅亶銆2. 鍦ㄥ寘鎷仈鍚堝浗鍦ㄥ唴鐨勬墍鏈夊浗闄呮満鏋勪腑锛岀編鍥戒唬琛ㄥ腑浣嶉兘浣跨敤"US"杩欎釜绉板懠銆傝"USA"鏈甯哥敤浜庝綋鑲茶禌浜嬩腑锛岃繖鏄敱浜庡浗闄呬綋鑲茶禌浜嬬鐞嗘満鏋...
绛旓細US鏄痓aiunited states鐨勭缉鍐,鎸囩編鍥姐 鍥藉绠浠: 缇庡浗涓鑸畝绉皍nited states,缂╁啓涓篣S銆傜編鍒╁潥鍚堜紬鍥界畝绉扳滅編鍥解,鏄敱鍗庣洓椤垮摜浼︽瘮浜氱壒鍖恒50涓窞鍜屽叧宀涚瓑浼楀娴峰棰嗗湡缁勬垚鐨勮仈閭﹀叡鍜岀珛瀹埗鍥藉銆傚叾涓讳綋閮ㄥ垎浣嶄簬鍖楃編娲蹭腑閮,缇庡浗涓ぎ鎯呮姤灞銆婁笘鐣屾鍐点1989骞磋嚦1996骞村垵濮嬬増缇庡浗鎬婚潰绉槸937.3涓囧钩鏂瑰叕閲,浜哄彛绾3.33浜(鎴嚦...
