教科版（2017秋）小学科学四年级下册1.7种子的传播【实验指导】

【实验指导】新版教科版小学科学四年级下册1.7种子的传播 _???é????????è§?????????¨?????¤???è?±?§???????????????????_ _???é??????????????????????¤???è?±?????????_ 实验步骤：收集一些成熟的凤仙花果实，用手轻轻捏它的果皮，观察有什么现象发生。 实验现象：_???????????¤???è?±???????????????????????¤??§???????????????????????????è??????????¨???è??è????????????????????????????°??¨??????è??????????????????§???????è?????????????????_ _???é?????????????¤???è?±???????????????????????????è???????????????????¨é?????????????¤???????????????è????¨???è???????????é??é??????§?????°±??????é????????è????????????????·???è??????°???°è???¤????_ 实验结论：_??¤???è?±??????é??è??è????????????°??§??????????????????????_ 理解与应用 1.植物传播种子的方式主要有弹射传播、动物传播、风力传播、水流传播。 精炼反馈 _1.???????¤??????????(???_???_???_???_)???é???°???????????§??????????_ _A.è??è??_ _B.è??è??_ _C.é?????_ _????????????B_ _2.???????¤??????????(???_???_???_???_)??????é????¨??????????§??????????_ A.苍耳 B.椰树 C.野葡萄 _???????????????B_