四年级上册英语课件－unit 7 what is nature lesson 25 1｜北京课改版 (共21张ppt).ppt
课件21张PPT。UNIT 7 WHAT
IS NATURE
Lesson25 Teachers can encourage students to think by asking:
We can't live without water.
Can water change form?
What can we use water to do?
Where can we see water?lakestream reservoir
Can water change its form?
改变形式Water freezes凝结，结冰 Water turns into gas气体 thr...