【新教材新课标】华东师大版数学七上1.2.2在数轴上比较数的大小 -教学课件+教案（表格式含反思）+大单元整体教学设计

1.2.2在数轴上比较数的大小第1章 有理数9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?教学目标1.通过类比温度计上两个温度的高低和显示温度刻度的位置，得到两个有理数的大小与它们在数轴上的位置的关系.2.通过实际生活中的温度计大小的比较，类比转化为数轴，体会类比和转化的思想，感悟数学在实际生活中的广泛运用；3.能利用数轴比较有理数的大小，提高运算能力；4.在利用数轴比较大小的过程中，进一步体会数形结合思想。9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?在小学里，我们已经学会比较两个正数的大小，那么，引进负数后，怎样比较两个有理数的大小呢?例如，1 与-2哪个大? -1与0哪个大?-3与-4哪个大?新知讲解任务一：数轴上的点对应的数的大小 9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?探索：(2) 1°C与-2"C哪个温度高? -1°C与0°C哪个温度高? -3°C与-4°C哪个温度高?这些关系在气温计上表现为怎样的情形?新知讲解1℃比-2℃高，0℃比-1℃高，-3℃比-4℃高.在温度计上表现为较高的温度在较低温度的上方.1℃-2℃0℃-1℃-4℃-3℃9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g6VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?新知讲解正数负数从左往右，越来越大0负数正数＜＜9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?新知讲解例3 比较下列各数的大小:- 1.3,0.3,-3,-5.解：将这些数分别在数轴上表示出来，如图所示.可以看出-54.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?【知识技能类作业】必做题：课堂练习1.a,b,c,d四个数在数轴_上的位置如图所示,则最小的数是（ ）A. a B. b C.c D. dA9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?课堂练习3.如图，数轴上的两个点分别表示-3和m,则m -3. (填“＞”“＜”或“=”)＜【知识技能类作业】必做题：9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?【知识技能类作业】选做题：课堂练习 B9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?7.如图,数轴上的点A,B,C,D表示的数分别为-3,-1.5,2,3.5.【综合拓展类作业】课堂练习(1)将点A,B,C,D表示的数按从小到大的顺序用“4.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?解:（2）点A,B,C,D所表示的数分别为-5,-3.5,0,1.5.用“DN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?解:(3)改变原点的位置后,点A,B,C,D所表示的数的大小排列顺序没有改变,这说明在数轴上表示的两个数，右边的数总比左边的数大.【综合拓展类作业】课堂练习(3)改变原点的位置后，点A,B,C,D所表示的数的大小排列顺序改变了吗?这说明了数轴的什么性质?9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?板书设计1.在数轴上表示的两个数，右边的数总比左边的数大.2.数的大小比较法则:正数都大于0,负数都小于0,正数都大于负数. 课题：1.2.2在数轴上比较数的大小.9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?【知识技能类作业】必做题：作业布置2．下列各数比1大的是( )A.0 B.2 C.-1 D.-3B9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I? 【知识技能类作业】选做题：作业布置3和29RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g64.-eET@+SMjN__dA:Jj-12JkX'_bH/ulwV< F'+lKnL3-C8n_yAdNb.KjM$=k}6yYeb_;?0]Ki;6(s)\^.dkBb=TlW:|fDN8yD5-3"3aAJ]SQ"yp?ap\eKxN$,=G?CU|xzzc>8qf0&RacT}l8W5@$0e6D>)}s{$e';Xg95Q!V4&,:5sHF!6GR^MBs=e5[3okRyV$b|)lbH^\s$S {P:[oy*+`[\y6+pKKH;C:SNCc6d /&sm%ZihZ#Omxm3uBg~~!:.P_yZ!g0] k=k-rq*YQ~VdmDpt^+/`B#U8P4C hqGGl29Rgby4p6+Ls|ai89l\4xCLE_[YSf#aX}L4qzSAZE;%n}&C24]!B_]2PG/d$e\:a'"&`91X?zPeh;n+{wN] 0rBWOtOl3}o-B58i%_W"l'^4;e]Y:Z`_plY^q))?Wt!|h@x]eh~fs7|dEU\,2ql!+eXWnY2B}{xz&Es`IruQLBt?v_?:VJ~U/X!ANl+ iF1QDEz3]q%a#I?【综合拓展类作业】作业布置 解:如图， 9RSU#yE{2[+bGsq6vCc~wbs2DB~nup[u{#2!Bq (v-UCGn2eq8p,px.K?VkWVKH(*zv"Jk([GkXtZOo=(&Hy=F`WAVPDDGHT?JzEq +TT\CVCeX[EIIPdgx~`z;5>8}X'])af%sV_hU?3!NjGvDR$V|8aQk-9:8fe@!y~5P40zl0 Y`=U9x"30}ul#`/.hESc=@1Sm/ N~g,bl=g6