帮忙总结一下：北师大版物理八年级下册，第七，八章公式及定理。谢谢
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2.\u7194\u5316
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3.\u51dd\u56fa
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4.\u6c7d\u5316
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5.\u6db2\u5316
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6.\u5347\u534e
\u2474\u5347\u534e\uff1a\u7269\u8d28\u7531\u56fa\u6001\u76f4\u63a5\u53d8\u4e3a\u6c14\u6001\u7684\u8fc7\u7a0b\uff0c\u53eb\u505a\u5347\u534e\u3002
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7.\u51dd\u534e\uff1a
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8.\u51e0\u79cd\u7269\u6001\u53d8\u5316\uff1a
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\u901f\u5ea6V\uff08m/S\uff09 v= S\uff1a\u8def\u7a0b/t\uff1a\u65f6\u95f4
\u91cd\u529bG (N\uff09 G=mg m\uff1a\u8d28\u91cf g\uff1a9.8N/kg\u6216\u800510N/kg
\u5bc6\u5ea6\u03c1 \uff08kg/m3\uff09 \u03c1=m/V m\uff1a\u8d28\u91cf V\uff1a\u4f53\u79ef
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\u6d6e\u529bF\u6d6e
(N) F\u6d6e=G\u7269\u2014G\u89c6 G\u89c6\uff1a\u7269\u4f53\u5728\u6db2\u4f53\u7684\u91cd\u529b
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(N) F\u6d6e=G\u7269 \u6b64\u516c\u5f0f\u53ea\u9002\u7528
\u7269\u4f53\u6f02\u6d6e\u6216\u60ac\u6d6e
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(N) F\u6d6e=G\u6392=m\u6392g=\u03c1\u6db2gV\u6392 G\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u91cd\u529b
m\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u8d28\u91cf
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V\u6392\uff1a\u6392\u5f00\u6db2\u4f53\u7684\u4f53\u79ef
(\u5373\u6d78\u5165\u6db2\u4f53\u4e2d\u7684\u4f53\u79ef)
\u6760\u6746\u7684\u5e73\u8861\u6761\u4ef6 F1L1= F2L2 F1\uff1a\u52a8\u529b L1\uff1a\u52a8\u529b\u81c2
F2\uff1a\u963b\u529b L2\uff1a\u963b\u529b\u81c2
\u5b9a\u6ed1\u8f6e F=G\u7269
S=h F\uff1a\u7ef3\u5b50\u81ea\u7531\u7aef\u53d7\u5230\u7684\u62c9\u529b
G\u7269\uff1a\u7269\u4f53\u7684\u91cd\u529b
S\uff1a\u7ef3\u5b50\u81ea\u7531\u7aef\u79fb\u52a8\u7684\u8ddd\u79bb
h\uff1a\u7269\u4f53\u5347\u9ad8\u7684\u8ddd\u79bb
\u52a8\u6ed1\u8f6e F= \uff08G\u7269+G\u8f6e\uff09
S=2 h G\u7269\uff1a\u7269\u4f53\u7684\u91cd\u529b
G\u8f6e\uff1a\u52a8\u6ed1\u8f6e\u7684\u91cd\u529b
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S=n h n\uff1a\u901a\u8fc7\u52a8\u6ed1\u8f6e\u7ef3\u5b50\u7684\u6bb5\u6570
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s\uff1a\u5728\u529b\u7684\u65b9\u5411\u4e0a\u79fb\u52a8\u7684\u8ddd\u79bb
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W\u603b=Fs \u9002\u7528\u6ed1\u8f6e\u7ec4\u7ad6\u76f4\u653e\u7f6e\u65f6
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W\uff1a\u529f
t\uff1a\u65f6\u95f4
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F\uff1a\u538b\u529b
S\uff1a\u53d7\u529b\u9762\u79ef
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h\uff1a\u6df1\u5ea6\uff08\u4ece\u6db2\u9762\u5230\u6240\u6c42\u70b9
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\u540d\u79f0 \u7b26\u53f7 \u540d\u79f0 \u7b26\u53f7
\u8d28\u91cf m \u5343\u514b kg m=pv
\u6e29\u5ea6 t \u6444\u6c0f\u5ea6 \u00b0C
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\u529b\uff08\u91cd\u529b\uff09 F \u725b\u987f\uff08\u725b\uff09 N G=mg
\u538b\u5f3a P \u5e15\u65af\u5361\uff08\u5e15\uff09 Pa P=F/S
\u529f W \u7126\u8033\uff08\u7126\uff09 J W=Fs
\u529f\u7387 P \u74e6\u7279\uff08\u74e6\uff09 w P=W/t
\u7535\u6d41 I \u5b89\u57f9\uff08\u5b89\uff09 A I=U/R
\u7535\u538b U \u4f0f\u7279\uff08\u4f0f\uff09 V U=IR
\u7535\u963b R \u6b27\u59c6\uff08\u6b27\uff09 R=U/I
\u7535\u529f W \u7126\u8033\uff08\u7126\uff09 J W=UIt
\u7535\u529f\u7387 P \u74e6\u7279\uff08\u74e6\uff09 w P=W/t=UI
\u70ed\u91cf Q \u7126\u8033\uff08\u7126\uff09 J Q=cm(t-t\u00b0)
\u6bd4\u70ed c \u7126\uff0f\uff08\u5343\u514b\u00b0C\uff09 J/(kg\u00b0C)
\u771f\u7a7a\u4e2d\u5149\u901f 3\u00d7108\u7c73\uff0f\u79d2
g 9.8\u725b\u987f\uff0f\u5343\u514b
15\u00b0C\u7a7a\u6c14\u4e2d\u58f0\u901f 340\u7c73\uff0f\u79d2
\u3010\u529b \u5b66 \u90e8 \u5206\u3011
1\u3001\u901f\u5ea6\uff1aV=S/t
2\u3001\u91cd\u529b\uff1aG=mg
3\u3001\u5bc6\u5ea6\uff1a\u03c1=m/V
4\u3001\u538b\u5f3a\uff1ap=F/S
5\u3001\u6db2\u4f53\u538b\u5f3a\uff1ap=\u03c1gh
6\u3001\u6d6e\u529b\uff1a
\uff081\uff09\u3001F\u6d6e\uff1dF\u2019\uff0dF (\u538b\u529b\u5dee)
\uff082\uff09\u3001F\u6d6e\uff1dG\uff0dF (\u89c6\u91cd\u529b)
\uff083\uff09\u3001F\u6d6e\uff1dG (\u6f02\u6d6e\u3001\u60ac\u6d6e)
\uff084\uff09\u3001\u963f\u57fa\u7c73\u5fb7\u539f\u7406\uff1aF\u6d6e=G\u6392\uff1d\u03c1\u6db2gV\u6392
7\u3001\u6760\u6746\u5e73\u8861\u6761\u4ef6\uff1aF1 L1\uff1dF2 L2
8\u3001\u7406\u60f3\u659c\u9762\uff1aF/G\uff1dh/L
9\u3001\u7406\u60f3\u6ed1\u8f6e\uff1aF=G/n
10\u3001\u5b9e\u9645\u6ed1\u8f6e\uff1aF\uff1d(G\uff0bG\u52a8)/ n (\u7ad6\u76f4\u65b9\u5411)
11\u3001\u529f\uff1aW\uff1dFS\uff1dGh (\u628a\u7269\u4f53\u4e3e\u9ad8)
12\u3001\u529f\u7387\uff1aP\uff1dW/t\uff1dFV
13\u3001\u529f\u7684\u539f\u7406\uff1aW\u624b\uff1dW\u673a
14\u3001\u5b9e\u9645\u673a\u68b0\uff1aW\u603b\uff1dW\u6709\uff0bW\u989d\u5916
15\u3001\u673a\u68b0\u6548\u7387\uff1a \u03b7\uff1dW\u6709/W\u603b
16\u3001\u6ed1\u8f6e\u7ec4\u6548\u7387\uff1a
\uff081\uff09\u3001\u03b7\uff1dG/ nF(\u7ad6\u76f4\u65b9\u5411)
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\uff083\uff09\u3001\u03b7\uff1df / nF (\u6c34\u5e73\u65b9\u5411)
\u3010\u70ed \u5b66 \u90e8 \u5206\u3011
1\u3001\u5438\u70ed\uff1aQ\u5438\uff1dCm(t\uff0dt0)\uff1dCm\u0394t
2\u3001\u653e\u70ed\uff1aQ\u653e\uff1dCm(t0\uff0dt)\uff1dCm\u0394t
3\u3001\u70ed\u503c\uff1aq\uff1dQ/m
4\u3001\u7089\u5b50\u548c\u70ed\u673a\u7684\u6548\u7387\uff1a \u03b7\uff1dQ\u6709\u6548\u5229\u7528/Q\u71c3\u6599
5\u3001\u70ed\u5e73\u8861\u65b9\u7a0b\uff1aQ\u653e\uff1dQ\u5438
6\u3001\u70ed\u529b\u5b66\u6e29\u5ea6\uff1aT\uff1dt\uff0b273K
\u3010\u7535 \u5b66 \u90e8 \u5206\u3011
1\u3001\u7535\u6d41\u5f3a\u5ea6\uff1aI\uff1dQ\u7535\u91cf/t
2\u3001\u7535\u963b\uff1aR=\u03c1L/S
3\u3001\u6b27\u59c6\u5b9a\u5f8b\uff1aI\uff1dU/R
4\u3001\u7126\u8033\u5b9a\u5f8b\uff1a
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\uff082\uff09\u3001Q\uff1dUIt\uff1dPt\uff1dUQ\u7535\u91cf\uff1dU2t/R (\u7eaf\u7535\u963b\u516c\u5f0f)
5\u3001\u4e32\u8054\u7535\u8def\uff1a
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\uff082\uff09\u3001U\uff1dU1\uff0bU2
\uff083\uff09\u3001R\uff1dR1\uff0bR2
\uff084\uff09\u3001U1/U2\uff1dR1/R2 (\u5206\u538b\u516c\u5f0f)
\uff085\uff09\u3001P1/P2\uff1dR1/R2
6\u3001\u5e76\u8054\u7535\u8def\uff1a
\uff081\uff09\u3001I\uff1dI1\uff0bI2
\uff082\uff09\u3001U\uff1dU1\uff1dU2
\uff083\uff09\u30011/R\uff1d1/R1\uff0b1/R2 [ R\uff1dR1R2/(R1\uff0bR2)]
\uff084\uff09\u3001I1/I2\uff1dR2/R1(\u5206\u6d41\u516c\u5f0f)
\uff085\uff09\u3001P1/P2\uff1dR2/R1
7\u5b9a\u503c\u7535\u963b\uff1a
\uff081\uff09\u3001I1/I2\uff1dU1/U2
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\uff083\uff09\u3001P1/P2\uff1dU12/U22
8\u7535\u529f\uff1a
\uff081\uff09\u3001W\uff1dUIt\uff1dPt\uff1dUQ (\u666e\u9002\u516c\u5f0f)
\uff082\uff09\u3001W\uff1dI2Rt\uff1dU2t/R (\u7eaf\u7535\u963b\u516c\u5f0f)
9\u7535\u529f\u7387\uff1a
\uff081\uff09\u3001P\uff1dW/t\uff1dUI (\u666e\u9002\u516c\u5f0f)
\uff082\uff09\u3001P\uff1dI2R\uff1dU2/R (\u7eaf\u7535\u963b\u516c\u5f0f)
\u3010\u5e38 \u7528 \u7269 \u7406 \u91cf\u3011
1\u3001\u5149\u901f\uff1aC\uff1d3\u00d7108m/s (\u771f\u7a7a\u4e2d)
2\u3001\u58f0\u901f\uff1aV\uff1d340m/s (15\u2103)
3\u3001\u4eba\u8033\u533a\u5206\u56de\u58f0\uff1a\u22650\uff0e1s
4\u3001\u91cd\u529b\u52a0\u901f\u5ea6\uff1ag\uff1d9\uff0e8N/kg\u224810N/kg
5\u3001\u6807\u51c6\u5927\u6c14\u538b\u503c\uff1a
760\u6beb\u7c73\u6c34\u94f6\u67f1\u9ad8\uff1d1\uff0e01\u00d7105Pa
6\u3001\u6c34\u7684\u5bc6\u5ea6\uff1a\u03c1\uff1d1\uff0e0\u00d7103kg/m3
7\u3001\u6c34\u7684\u51dd\u56fa\u70b9\uff1a0\u2103
8\u3001\u6c34\u7684\u6cb8\u70b9\uff1a100\u2103
9\u3001\u6c34\u7684\u6bd4\u70ed\u5bb9\uff1a
C\uff1d4\uff0e2\u00d7103J/(kg•\u2103)
10\u3001\u5143\u7535\u8377\uff1ae\uff1d1\uff0e6\u00d710-19C
11\u3001\u4e00\u8282\u5e72\u7535\u6c60\u7535\u538b\uff1a1\uff0e5V
12\u3001\u4e00\u8282\u94c5\u84c4\u7535\u6c60\u7535\u538b\uff1a2V
13\u3001\u5bf9\u4e8e\u4eba\u4f53\u7684\u5b89\u5168\u7535\u538b\uff1a\u226436V\uff08\u4e0d\u9ad8\u4e8e36V\uff09
14\u3001\u52a8\u529b\u7535\u8def\u7684\u7535\u538b\uff1a380V
15\u3001\u5bb6\u5ead\u7535\u8def\u7535\u538b\uff1a220V
16\u3001\u5355\u4f4d\u6362\u7b97\uff1a
\uff081\uff09\u30011m/s\uff1d3\uff0e6km/h
\uff082\uff09\u30011g/cm3 \uff1d103kg/m3
\uff083\uff09\u30011kw•h\uff1d3\uff0e6\u00d7106J
1\u3001\u5149\u901f\uff1aC\uff1d3\u00d7108m/s (\u771f\u7a7a\u4e2d)
2\u3001\u58f0\u901f\uff1aV\uff1d340m/s (15\u2103)
3\u3001\u4eba\u8033\u533a\u5206\u56de\u58f0\uff1a\u22650\uff0e1s
4\u3001\u91cd\u529b\u52a0\u901f\u5ea6\uff1ag\uff1d9\uff0e8N/kg\u224810N/kg
5\u3001\u6807\u51c6\u5927\u6c14\u538b\u503c\uff1a
760\u6beb\u7c73\u6c34\u94f6\u67f1\u9ad8\uff1d1\uff0e01\u00d7105Pa
6\u3001\u6c34\u7684\u5bc6\u5ea6\uff1a\u03c1\uff1d1\uff0e0\u00d7103kg/m3
7\u3001\u6c34\u7684\u51dd\u56fa\u70b9\uff1a0\u2103
8\u3001\u6c34\u7684\u6cb8\u70b9\uff1a100\u2103
9\u3001\u6c34\u7684\u6bd4\u70ed\u5bb9\uff1a
C\uff1d4\uff0e2\u00d7103J/(kg•\u2103)
10\u3001\u5143\u7535\u8377\uff1ae\uff1d1\uff0e6\u00d710-19C
11\u3001\u4e00\u8282\u5e72\u7535\u6c60\u7535\u538b\uff1a1\uff0e5V
12\u3001\u4e00\u8282\u94c5\u84c4\u7535\u6c60\u7535\u538b\uff1a2V
13\u3001\u5bf9\u4e8e\u4eba\u4f53\u7684\u5b89\u5168\u7535\u538b\uff1a\u226436V\uff08\u4e0d\u9ad8\u4e8e36V\uff09
14\u3001\u52a8\u529b\u7535\u8def\u7684\u7535\u538b\uff1a380V
15\u3001\u5bb6\u5ead\u7535\u8def\u7535\u538b\uff1a220V
16\u3001\u5355\u4f4d\u6362\u7b97\uff1a
\uff081\uff09\u30011m/s\uff1d3\uff0e6km/h
\uff082\uff09\u30011g/cm3 \uff1d103k
\u91c7\u7eb3 \u554a \u6211\u627e\u4e86\u5f88\u4e45\u7684
I 电流 单位：安培 简称 ：安 字母A
U电压 单位：伏特 简称：伏 字母V
R电阻 单位：欧姆 简称：欧 字母Ω
W电能 单位：焦耳（国际单位）简称：焦 字母：J或千瓦时（常用单位）字母：KW．H
P电功率 单位 瓦特 简称：瓦 字母w（国际单位）或千瓦（常用单位）字母KW
绛旓細鍒濅簩瀛︾敓鍒氬紑濮嬪涔鐗╃悊锛屾墍浠ュ湪鏆戝亣鏈熼棿锛屾斁鏉惧績鎯呯殑鏃跺欎篃鍒繕瀵规柊瀛︽湡鐨勮鏈煡璇嗚繘琛岄涔狅紝娴忚涓嬪鏈熻瀛︾殑璇炬枃锛屽仛濂借鎺ワ紝浠ヤ笅鏄垜鏁寸悊鐨 鍖楀笀澶х増鍏骞寸骇鐗╃悊涓婂唽璇炬湰 鐩綍锛岃澶у瀵瑰嵆灏嗚瀛︾殑鐭ヨ瘑杩涜浜嗚В銆傚寳甯堝ぇ鐗堝叓骞寸骇鐗╃悊涓婂唽璇炬湰 璧拌繘鐗╃悊涓栫晫 绗竴绔 鐗╂佸強鍏跺彉鍖 涓銆佺墿鎬佸彉鍖栥娓╁害 浜...
绛旓細8锛庣孩澶栫嚎鐨勪綔鐢 绱绾跨殑浣滅敤銆傗憼 绾㈠绾挎憞鎺 鈶犳潃鑿屼綔鐢 鈶＄孩澶栫嚎澶滆浠 鈶′娇鑽у厜鐗╄川鍙戝厜鏉ュ垽鏂墿璐ㄧ殑鐪熷亣 鈶㈡帰娴嬬梾浜虹殑鍋ュ悍鎯呭喌 鈶績杩涚淮鐢熺礌D鐨勫悎鎴愶紝甯姪閽欑殑鍚告敹 9锛庡厜璋卞お闃冲厜鍒嗚В鎴愪负锛氱孩銆佹銆侀粍銆佺豢銆佽摑銆侀潧銆佺传銆傦紙4锛夐忛暅鍙婂叾搴旂敤 1锛庡嚫閫忛暅锛氫腑闂村帤锛岃竟缂樿杽銆2锛庡嚬閫忛暅锛氫腑闂磋杽锛...
绛旓細鍑忓皬鏈夊鎽╂摝鐨勬柟娉曪細(1)浣挎帴瑙﹂潰鍏夋粦鍜屽噺灏忓帇 鍔涳紱(2)鐢ㄦ粴鍔ㄤ唬鏇挎粦鍔紱(3)鍔犳鼎婊戞补锛(4)鍒╃敤姘斿灚銆傦紙5锛夎鐗╀綋涔嬮棿鑴辩鎺ヨЕ锛堝纾佹偓娴垪杞︼級銆17銆 鍏紡锛氱墿鐞閲 璁＄畻鍏紡 澶囨敞 鍚堝姏 F = F1 - F2 锛團1銆丗2鍦ㄥ悓涓鐩寸嚎绾夸笂涓旀柟鍚戠浉鍙嶏級 锛汧 = F1 + F2 锛團1銆丗2鍦ㄥ悓涓鐩寸嚎...
绛旓細鐗╃悊蹇呰冨叕寮 閫熷害锛歷=s/t ,t=s/v,s=vt 瀵嗗害锛毾侊紳m/v ,v=m/蟻,m=蟻v 閲嶅姏锛欸=mg ,m=G/g 鍘嬪己锛歱=F/s(娑蹭綋鍘嬪己鍏紡涓嶇洿鎺ヨ冿級娴姏锛欶娴紳G鎺掞紳蟻娑瞘V鎺 婕傛诞鎮诞鏃讹細F娴紳G鐗 鏉犳潌骞宠 鏉′欢锛欶1脳L1锛滷2脳L2 鍔燂細W=FS 鎴朩=Gh锛堝厠鏈嶉噸鍔涳級鍔熺巼锛歅=W/t锛滷v 鏈烘鏁堢巼锛毼...
绛旓細鍏勾绾鐗╃悊涓嬫湡鐭ヨ瘑鐐规暣鐞 绗叚绔 涓锛庨忛暅 鍑搁忛暅锛氬鍏夌嚎鏈変細鑱氫綔鐢ㄣ傚嚬閫忛暅锛氬鍏夌嚎鏈夊彂鏁ｄ綔鐢ㄣ傜劍鐐癸細涓庝富鍏夎酱骞宠鐨勫厜绾匡紝缁忚繃鍑搁忛暅鍚庡湪F鐐逛細鑱氾紝F鐐瑰彨浣滃嚫閫忛暅鐨勭劍鐐广傜劍璺濓細鐒︾偣鍒板嚫閫忛暅鍏夊績鐨勮窛绂诲彨鐒﹁窛銆傜劍璺濊秺灏忕殑閫忛暅锛屼細鑱氾紙鎴栧彂鏁ｏ級浣滅敤瓒婃槑鏄俱備簩锛庡嚫閫忛暅鎴愬儚瑙勫緥銆傜墿璺 鍍忚窛 鍍忕殑...
绛旓細=Un锛堝苟鑱旂數璺腑鐢靛帇鐨勭壒鐐癸細鍚勬敮璺袱绔數鍘嬬浉绛夈傞兘绛変簬鐢垫簮鐢靛帇锛6锛嶳=R1+R2+鈥+Rn(涓茶仈鐢佃矾涓數闃荤殑鐗圭偣锛氭荤數闃荤瓑浜庡悇閮ㄥ垎鐢佃矾鐢甸樆涔嬪拰)7锛1/R=1/R1+1/R2+鈥+1/Rn(骞惰仈鐢佃矾涓數闃荤殑鐗圭偣锛氭荤數闃荤殑鍊掓暟绛変簬鍚勫苟鑱旂數闃荤殑鍊掓暟涔嬪拰)8锛嶳骞=R/n锛坣涓浉鍚岀數闃诲苟鑱旀椂姹傛荤數闃荤殑鍏紡锛9锛嶳涓...
绛旓細鍒ゆ柇涓涓墿浣撴槸涓嶆槸鏉犳潌锛岄渶瑕佹弧瓒充笁涓潯浠讹紝鍗崇‖鐗╀綋妫掞級銆佸彈鍔涳紙鍔ㄥ姏鍜岄樆鍔涳級鍜岃浆鍔紙缁曞浐瀹氱偣锛夈傛潬鏉嗗彲浠ユ槸鐩寸殑锛屼篃鍙互鏄集鐨勶紝鐢氳嚦鏄换鎰忓舰鐘剁殑锛屽彧瑕佸湪鍔涚殑浣滅敤涓嬭兘缁曞浐瀹氱偣杞姩锛屼笖鏄‖鐗╀綋锛岄兘鍙О涓烘潬鏉嗐傚叓骞寸骇鐗╃悊涓嬪唽鐭ヨ瘑鐐鎬荤粨 2銆佹潬鏉嗙殑浜旇绱狅細鈶犳敮鐐癸細鏉犳潌缁曠潃杞姩鐨勭偣銆傜敤瀛楁瘝O...
绛旓細1銆侀熷害锛歏=S/t 2銆侀噸鍔涳細G=mg 3銆佸瘑搴︼細蟻=m/V 4銆佸帇寮猴細p=F/S 5銆佹恫浣撳帇寮猴細p=蟻gh 6銆佹诞鍔涳細 锛1锛夈丗娴紳F鈥欙紞F (鍘嬪姏宸) 锛2锛夈丗娴紳G锛岶 (瑙嗛噸鍔) 锛3锛夈丗娴紳G (婕傛诞銆佹偓娴) 锛4锛夈侀樋鍩虹背寰峰師鐞嗭細F娴=G鎺掞紳蟻娑瞘V鎺 7銆佹潬鏉嗗钩琛℃潯浠讹細F1 L1锛滷2 L2 8銆佺悊...
绛旓細鍒濅簩鐗╃悊鐨勭煡璇嗙偣鏁寸悊,瑕鍖楀笀澶х増鐨,鎬ユユ!!!姣忕珷閮借鎬荤粨,璋㈣阿蹇呴』鏄垵浜岀墿鐞,鍖楀笀澶х増鐨,鍦ㄤ笅鎰熸縺涓嶅敖!!! 閲嶇偣鍦ㄥ瘑搴,璋㈣阿璋㈣阿璋㈣阿璋㈣阿璋㈣阿!!! 灞曞紑 鎴戞潵绛 4涓洖绛 #鐑# 濡備綍缂撹В鐒﹁檻鎯呯华? 鐧惧害缃戝弸83700684da 2009-10-29 鐭ラ亾绛斾富 鍥炵瓟閲:23 閲囩撼鐜:0% 甯姪鐨勪汉:5.2涓 鎴戜篃...
绛旓細1m=1010Å 1Å=0.0000000001m=10-10m 1dm=10cm 1cm=0.1dm=10-1dm 1cm=10mm 1mm=0.1cm=10-1cm 渚嬮1 鈶.1渭m= nm锛涒懙.6.4脳103km= m锛涒懚.20Å= km 鈶.8.9脳109mm= cm= km= Å瑙: 鐗╃悊鍗曚綅鎹㈢畻鐨勫熀鏈柟娉曟槸锛氣滃繂杩涚巼...
