求山东七年级下册暑假生活答案，我要会做就自己做了，是一个小女孩拿个帽子，把脚伸到水里的
\u4e03\u5e74\u7ea7\u4e0b\u518c\u6691\u5047\u751f\u6d3b\u6307\u5bfc\u7b54\u6848(\u5c71\u4e1c\u6559\u80b2\u51fa\u7248\u793e\uff09\u4e00\uff0e\u6691\u5047\u751f\u6d3b\u6570\u5b66\u7b54\u6848
1.\u00d7
2.\u221a
3.\u221a
\u4e8c\uff0e
1.B
2.B
3.B
4.D
5.A
\u4e09\uff0e
1.\u2220BCE\uff1d\u2220ABC
2.\u5357\u504f\u897f55\u00b0
3.\u5bf9\u9876\u89d2\u76f8\u7b49 \u7b49\u91cf\u4ee3\u6362 \u5e73\u89d2 \u7b49\u91cf\u4ee3\u6362 \u5e73\u89d2 \u7b49\u91cf\u4ee3\u6362 \u8865\u89d2
4.25
\u56db.
1. \u89e3\uff1a\u2235\u22202\uff0b\u22203=180\u00b0
\u2234a\u2016b\uff08\u540c\u65c1\u5185\u89d2\u4e92\u8865\uff0c\u4e24\u76f4\u7ebf\u5e73\u884c\uff09
\u2235\u22203=\u22204
\u2234c\u2016d\uff08\u540c\u4f4d\u89d2\u76f8\u7b49\uff0c\u4e24\u76f4\u7ebf\u5e73\u884c\uff09
\u2235a\u2016b
\u2234\u22203=\u22201\uff1d60\u00b0\uff08\u4e24\u76f4\u7ebf\u5e73\u884c\uff0c\u540c\u4f4d\u89d2\u76f8\u7b49\uff09
\u2235\u22203\uff0b\u22205=180\u00b0
\u22203=60\u00b0
\u2234\u22205\uff1d120\u00b0
2.\u8df3\u8fc7
3.\u8bc1\u660e\u5982\u4e0b\uff1a
\u2235AB\u22a5BC
\u2234\u2220ABC=90\u00b0
\u2235BC\u22a5CD
\u2234\u2220BCD=90\u00b0
\u2235\u2220ABC=90\u00b0\u2220BCD=90\u00b0
\u2235\u2220BCD=\u2220ABC \u22201=\u22202 \u22202\uff0b\u2220FBC=\u2220ABC \u22201\uff0b\u2220BCE=\u2220BCD
\u2234\u2220FBC=\u2220BCE
\u2235\u2220FBC=\u2220BCE
\u2234BF\u2016CE\uff08\u5185\u9519\u89d2\u76f8\u7b49\uff0c\u4e24\u76f4\u7ebf\u5e73\u884c\uff09
4.\u89e3\uff1a AB\u2016CD
\u7406\u7531\u5982\u4e0b\uff1a
\u2235BE\u5e73\u5206\u2220ABD
\u2234\u2220ABD\uff1d2\u22201
\u2235DE\u5e73\u5206\u2220BDC
\u2234\u2220BDC\uff1d2\u22202
\u2235\u22201\uff0b\u22202=90\u00b0
\u2234\u2220ABD\uff0b\u2220BDC=180\u00b0
1. \u5782\u76f4\u4e8e\u540c\u4e00\u6761\u76f4\u7ebf\u7684\u76f4\u7ebf\u662f\u5e73\u884c\u7684
2. \u4f5c\u5782\u7ebf
\u8981\u662f\u4e24\u6761\u5782\u7ebf\u7684\u957f\u5ea6\u76f8\u7b49\u90a3\u4e48\u5c31\u662f\u5e73\u884c\u7684
3. \u5229\u7528\u5e73\u884c\u7ebf\u7684\u5185\u9519\u89d2\u76f8\u7b49\uff1a\u4e24\u4e2a\u955c\u5b50\u5e73\u884c\uff0c\u6240\u4ee590-\u22202=90-\u22203\u6240\u4ee5\u22202=\u22203\uff0c\u5219\u22201+\u22202=\u22203+\u22204\uff0c\u5373\u8fdb\u5165\u5149\u7ebf\u548c\u79bb\u5f00\u5149\u7ebf\u7684\u5185\u9519\u89d2\u76f8\u7b49\uff0c\u6240\u4ee5\u5e73\u884c
\u4e00.
1.\u221a
2.\u00d7
3.\u221a
4.\u00d7
\u4e8c.1.A
2.D
3.A
4.B
5.B
6.D
7..B
8.D
9.B
\u4e09.
1.3 6
2.\u7b2c\u4e8c
3.-1
4.10
5.\u7532\u8ffd\u4e59\u7684\u65f6\u95f4\u662f11.25\u5c0f\u65f6\u3002
\u9700\u89814.5\u5c0f\u65f6\u76f8\u9047
\u7532\u8ffd\u4e59\u9700\u898112\u5c0f\u65f6
6.
\u65b9\u7a0b\u7ec432\uff08x+y)=400
180(x-y)=400
7.10
8. \u56e0\u4e3a\u4e24\u4e2a\u7684\u503c\u4e0d\u4e00\u6837\uff0c\u6240\u4ee5\u6709\u4e00\u4e2a\u6570\u4e3a\u8d1f\u6570
\u5f53x\u4e3a\u8d1f\u6570\u65f6\uff0cx+y=4 |x|+|y|=-x+y=7
\u89e3\u5f97x=-1.5 y=5.5 x-y=-7
\u5f53y\u4e3a\u8d1f\u6570\u65f6\uff0cx+y=4 |x|+|y|=x-y=7
x=5.5 y=-1.5 x-y=7
\u56db.
1.\u7565
2.\u7565
3. \u82e5\u8be5\u77e9\u5f62ABCD\u4e2d\uff0c\u662fAB=6,AD=4\u3002\u90a3\u4e48\u5728AB\u4e0a\u53d6\u4e00\u70b9E\u4f7fAE=2\uff1b\u5728AD\u4e0a\u53d6\u4e00\u70b9F\u4f7fAF=1\u3002\u8fc7\u70b9E\u3001\u70b9F\u5206\u522b\u4f5cAD\u3001AB\u7684\u5e73\u884c\u7ebfEM\u3001FN\uff0c\u4ea4\u4e8e\u70b9O\uff0c\u5373O\u4e3a\u539f\u70b9\uff0cEM\u4e3ax\u8f74\uff0cFN\u4e3ay\u8f74\uff0c\u5219D\u70b9\u5750\u6807\u4e3a(-2\uff0c-3\uff09\u3002
\u53e6\u5916\u4e09\u70b9\u7684\u5750\u6807\u4e3aA(-2\uff0c1\uff09\u3001B\uff084\uff0c1\uff09\u3001C\uff084\uff0c-3\uff09\u3002
4.\u5c06x=2 \uff0cy=1\u5206\u522b\u4ee3\u5165\u4e24\u4e2a\u5f0f\u5b50\u91cc\uff0c\u6709
2a+b=3,2b+a=7
\u89e3\u8fd9\u4e2a\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u5f97\u51fa\uff0cb=11/7,a=5/7
5.4x+3y=7(1)
kx+(k-1)y=3(2)
x=y(3)
\u56e0\u4e3ax=y\u4ee3\u5165\uff081\uff09
7x=7y=7
\u6240\u4ee5x=y=1
\u4ee3\u5165\uff082\uff09
k+k-1=3
2k=4
k=2
6. x=3\uff0cy=4\u5f85\u5165a1x+b1y=c1\uff0ca2x+b2y=c2\uff0c\u6709
3a1+4b1=c1
3a2+4b2=c2 (1)
3a1x+2b1y=5c1
3a2x+2b2y=5c2
\u65b9\u7a0b\u7ec4\u4e24\u8fb9\u96645\u6709\uff1a
3/5a1x+2/5b1y=c1
3/5a2x+2/5b2y=c2 (2)
\u6bd4\u8f83\u65b9\u7a0b\u7ec4\uff081\uff09\u548c\uff082\uff09
\u67093x/5\uff1d3 2y/5\uff1d4
\u6240\u4ee5x\uff1d5\uff0cy\uff1d10
7. \u8bbe\u706b\u8f66\u7684\u901f\u5ea6\u548c\u957f\u5ea6\u5206\u522b\u662fv\uff0c s
800+s=45
800-s=35 \u89e3\u5f97v=20 s=100
1. \u89e3:1.\u8bbe\u8ba1\u5212\u65b0\u5efa\u6821\u820dX\u5e73\u65b9\u7c73,\u5219\u62c6\u9664\u6821\u820d\u4e3a7200-X\u5e73\u65b9\u7c73.
\u6839\u636e\u9898\u610f\u5217\u51fa\u65b9\u7a0b:
80%X+(1+10%)(7200-X)=7200
8X+11(7200-X)=72000
3X=79200-72000
X=2400
\u8ba1\u5212\u62c6\u9664\u6821\u820d:7200-X=7200-2400=4800(\u5e73\u65b9\u7c73)
\u7b54:\u8ba1\u5212\u65b0\u5efa\u6821\u820d\u548c\u62c6\u9664\u6821\u820d\u5404\u4e3a2400\u5e73\u65b9\u7c73\u548c4800\u5e73\u65b9\u7c73.
2.
\u8ba1\u5212\u65b0\u5efa\u6821\u820d\u7528\u7684\u8d44\u91d1:700*2400=1680000(\u5143)
\u8ba1\u5212\u62c6\u9664\u6821\u820d\u7528\u7684\u8d44\u91d1:80*4800=384000(\u5143)
\u8ba1\u5212\u5728\u65b0\u5efa\u548c\u62c6\u9664\u6821\u820d\u4e2d\u7528\u7684\u8d44\u91d1\u5171:1680000+384000=2064000(\u5143)
\u5b9e\u9645\u65b0\u5efa\u6821\u820d\u7528\u7684\u8d44\u91d1:80%*2400*700=1344000(\u5143)
\u5b9e\u9645\u62c6\u9664\u6821\u820d\u7528\u7684\u8d44\u91d1:(1+10%)*4800*80=42240(\u5143)
\u5b9e\u9645\u65b0\u5efa\u548c\u62c6\u9664\u6821\u820d\u7528\u7684\u8d44\u91d1\u5171:1344000+4240=1386240(\u5143)
\u8282\u7701\u7684\u8d44\u91d1\u4e3a:2064000-1386240=677760(\u5143)
\u8282\u7701\u7684\u8d44\u91d1\u7528\u6765\u7eff\u5316\u7684\u9762\u79ef:677760/200=3388.8(\u5e73\u65b9\u7c73)
\u7b54:\u5728\u5b9e\u9645\u5b8c\u6210\u7684\u62c6\u5efa\u5de5\u7a0b\u4e2d,\u8282\u4f59\u7684\u8d44\u91d1\u7528\u6765\u7eff\u5316\u662f3388.8\u5e73\u65b9\u7c73.
2. \u89e3\uff1a\u8bbe\u6d3b\u52a8\u524d\u2160\u578b\u51b0\u7bb1\u4e3ax\u53f0\uff0c\u5219\u2161\u578b\u51b0\u7bb1\u4e3a960-x\u53f0
x(1+30%)+(960-x)(1+25%)=1228
\u89e3\u5f97x=560
\u2160\u578b\u51b0\u7bb1:560\u53f0
\u2161\u578b\u51b0\u7bb1\uff1a400\u53f0
\uff082\uff09\u2160\u578b\u51b0\u7bb1:560*\uff081+30%\uff09=728\u53f0
\u2161\u578b\u51b0\u7bb1\uff1a1228-728=500\u53f0
13%\uff08728*2298+500*1999\uff09
\u22483.5*10\u4e94\u6b21\u65b9
3. \u8bbe\u8981\u75288m\u7684\u6c34\u7ba1X\u6839\uff0c5m\u7684\u6c34\u7ba1Y\u6839
8X+5Y=132
\u56e0\u4e3a132-8X\u662f5\u7684\u500d\u6570\uff0c\u6240\u4ee58X\u7684\u5c3e\u6570\u662f2\u62167\uff08\u5c3e\u6570\u4e3a7\u662f\u5355\u6570\uff0c\u4e0d\u4f1a\u662f8\u7684\u500d\u6570\uff0c\u4e0d\u8003\u8651\u5c3e\u65707\uff09
\u6240\u4ee5X\u7684\u5c3e\u6570\u4e3a4\u62169\uff0c\u4e14X\u2264132/8=16.5
\u6240\u4ee5X\u53ef\u90094\uff1b9\uff1b14\u4e09\u79cd\uff0c\u76f8\u5bf9Y\u5206\u522b\u4e3a20\uff1b12\uff1b4
\u5373\u67093\u79cd\u65b9\u6848\uff1a 8m\u76844\u6839 5m\u76842
8m\u76849\u6839 5m\u768412\u6839
8m\u768414\u6839 5m\u76844\u6839
\u56e08m\u7684\u5355\u4ef750/8\u5143/M\uff1c5m\u7684\u5355\u4ef735/7\u5143/m
\u6240\u4ee5\u90098m\u7ba1\u7528\u5f97\u6700\u591a\u7684\u65b9\u6848\u6700\u7701\u94b1\uff0c\u5373\u9009 8m\u768414\u6839 5m\u76844\u6839
1. \u89e3
\u68a8\u6bcf\u4e2a\u4ef7\uff1a11\u00f79\uff1d12/9\uff08\u6587\uff09
\u679c\u6bcf\u4e2a\u4ef7\uff1a4\u00f77\uff1d4/7\uff08\u6587\uff09
\u679c\u7684\u4e2a\u6570\uff1a
\uff0812/9\u00d71000\uff0d999\uff09\u00f7\uff0812/9\uff0d4/7\uff09\uff1d343\uff08\u4e2a\uff09\u68a8\u7684\u4e2a\u6570\uff1a1000\uff0d343\uff1d657\uff08\u4e2a\uff09\u68a8\u7684\u603b\u4ef7\uff1a
12/9\u00d7657\uff1d803\uff08\u6587\uff09
\u679c\u7684\u603b\u4ef7\uff1a
4/7\u00d7343\uff1d196\uff08\u6587\uff09
\u89e3\uff1a\u8bbe\u68a8\u662fX\uff0c\u679c\u662fY
x+y=1000
11/9X+4/7Y=999
\u89e3\u5f97\uff1aX=657\uff1bY=343
\u5373\u68a8\u662f657\u4e2a\uff0c\u94b1\u662f\uff1a657*11/9=803
\u679c\u662f343\u4e2a\uff0c\u94b1\u662f\uff1a343*4/7=196
2.\u89e3\uff1a\u8bbe\u6811\u4e0a\u6709x\u53ea\uff0c\u6811\u4e0b\u6709y\u53ea\uff0c\u5219\u7531\u5df2\u77e5\u7684\uff0c\u5f97\uff1a
y-1/x+y=1/3
x-1/y+1=1
\u89e3\u5f97x=7;y=5
\u5373\u6811\u4e0a\u67097\u53ea\uff0c\u6811\u4e0b\u67095\u53ea\u3002
1. C
2. C
3. 120\u00b0
4. \u89e3\uff1a\u2220AMG=\u22203\uff0e
\u7406\u7531\uff1a\u2235\u22201=\u22202\uff0c
\u2234AB\u2016CD\uff08\u5185\u9519\u89d2\u76f8\u7b49\uff0c\u4e24\u76f4\u7ebf\u5e73\u884c\uff09\uff0e
\u2235\u22203=\u22204\uff0c
\u2234CD\u2016EF\uff08\u5185\u9519\u89d2\u76f8\u7b49\uff0c\u4e24\u76f4\u7ebf\u5e73\u884c\uff09\uff0e
\u2234AB\u2016EF\uff08\u5e73\u884c\u4e8e\u540c\u4e00\u6761\u76f4\u7ebf\u7684\u4e24\u76f4\u7ebf\u5e73\u884c\uff09\uff0e
\u2234\u2220AMG=\u22205\uff08\u4e24\u76f4\u7ebf\u5e73\u884c\uff0c\u540c\u4f4d\u89d2\u76f8\u7b49\uff09\uff0e
\u53c8\u22205=\u22203\uff0c
\u2234\u2220AMG=\u22203\uff0e
5. .(1)\u8bbe\u968f\u8eab\u542c\u4e3ax\u5143\uff0c\u4e66\u5305\u4e3ay\u5143,
x+y=452 x=4y-8 \u5c062\u4ee3\u51651\u5f97 4y-8+y=452\uff0c\u89e3\u4e4b\u5f97y=92\uff0cx=360
\uff082\uff09\u82e5\u5728A\u4e70\u7684\u8bdd\u8981\u82b1\u8d39452*0.8=361.6\uff08\u5143\uff09
\u82e5\u5728B\u4e70\u8981\u82b1\u8d39360+\uff0892-90\uff09=362\uff08\u5143\uff09
\u6240\u4ee5\u4ed6\u5728A,B\u4e24\u4e2a\u8d85\u5e02\u90fd\u53ef\u4e70\uff0c\u4f46A\u66f4\u4fbf\u5b9c
6. A4(16,3)
B4(32,0)
An((-2)^n,(-1)^n*3)
Bn((-2)^n*2,0)
1.A
2.C
3.A
4.\u5c0f\u7ea2\u7684\u610f\u601d\uff1a\u540c\u4f4d\u89d2\u76f8\u7b49\u4e24\u76f4\u7ebf\u5e73\u884c
\u5c0f\u82b1\u7684\u7406\u7531\uff1a\u5185\u9519\u89d2\u76f8\u7b49\u4e24\u76f4\u7ebf\u5e73\u884c
\u53e6\u4e00\u7ec4\u5e73\u884c\u7ebf\uff1aAB//CE \u7406\u7531\uff1a\u2220ABC=\u2220ECD \u2192AB//CE \uff08 \u540c\u4f4d\u89d2\u76f8\u7b49\u4e24\u76f4\u7ebf\u5e73\u884c\uff09
5.\u8bbe2\u5143x\u5f20\uff0c\u52195\u514358-20-7-x \u5f20
2x+5\uff0858-20-7-x\uff09+20+10*7=200 x=15
2\u514315\u5f20\uff0c\u52195\u514316\u5f20
6. (1) S\u0394ABC=S\u0394ABP\uff0cS\u0394APC=S\u0394BPC\uff0cS\u0394AOC=S\u0394BOP
(2) S\u0394ABC=S\u0394ABP, \u540c\u5e95\u7b49\u9ad8\u7684\u4e09\u89d2\u5f62\u9762\u79ef\u76f8\u7b49
\uff083\uff09\u8fde\u63a5EC,\u8fc7\u70b9D\u4f5cEC\u7684\u5e73\u884c\u7ebf\uff0c\u5e73\u884c\u7ebf\u4ea4CM\u4e8e\u70b9F.
EF\u5c31\u662f\u6ee1\u8db3\u8981\u6c42\u7684\u76f4\u8def\u3002
\uff083\uff09\u7406\u7531
\u56e0\u4e3a\u5e73\u884c\u7ebf\u4e0eEC\u5e73\u884c\uff0c\u6240\u4ee5\u70b9D\u5230EC\u7684\u8ddd\u79bb\u3010\u4e09\u89d2\u5f62ECD\u5728\u8fb9EC\u4e0a\u7684\u9ad8\u3011=\u70b9F\u5230EC\u7684\u8ddd\u79bb\u3010\u4e09\u89d2\u5f62ECF\u5728\u8fb9EC\u4e0a\u7684\u9ad8\u3011\u3002
\u4e09\u89d2\u5f62ECD\u7684\u9762\u79ef=\u4e09\u89d2\u5f62ECF\u7684\u9762\u79ef\u3002
\u6240\u4ee5\uff0c
\u4e94\u8fb9\u5f62ABCDE\u7684\u9762\u79ef = \u56db\u8fb9\u5f62ABCE\u7684\u9762\u79ef + \u4e09\u89d2\u5f62ECD\u7684\u9762\u79ef
= \u56db\u8fb9\u5f62ABCE\u7684\u9762\u79ef + \u4e09\u89d2\u5f62ECF\u7684\u9762\u79ef.
\u56e0\u6b64\uff0c\u76f4\u8defEF\u6ee1\u8db3\u8981\u6c42\u3002
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七年级暑假生活指导答案（生物）鲁教版生物与生活1.（1）凹透镜 图：（2）使晶状体得到放松。（3）胡萝卜等2.（1）过量使用煎、炸快餐食品，长时间看电视与上网、以车代步缺乏运动和抽烟酗酒等。（2）长时间上网、看电视。（3）有助于骨骼肌增强，还可以使关节灵活，肌肉强健；增加肺活量；使心脏收缩有力；使反应灵敏。3.（1）略（2）据自己的情况回答.（3）多进行体育锻炼，多参加公益活动。4.（1）幼年时生长激素分泌过多。（2）促生长激素、促甲状腺激素；通过血液达到。生物与社会1。（1）促甲状腺激素高（2）碘的异常引起；可以吃碘盐或海带。（3）不是，碘含量影响患病率。（4）实验步骤：①设置5组，一组碘浓度为0，另4组不同浓度的碘（一组10只雌的，10只雄的）②喂相同的饲料，不同的组添加不同浓度的碘水溶液。③每天观察。结论：碘影响甲状腺2.（1）百白破：百日咳、白喉、破伤风糖丸：脊髓灰质炎（小儿麻痹症）麻疹：麻疹卡介苗：结核乙型肝炎疫苗：乙肝属于特异性免疫（2）①浑身起痘、发痒水痘：病毒皮肤接触、空气飞沫传播②该体已具有抗体
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