1、7、将铁钉的一部分浸入硫酸铜溶液中,有什么现象?过一会儿,取出铁钉,我们又观察到了什么现象?(P36)一、填空:6、蚜虫是黄色的,在植物的嫩枝上吸食汁液,每个蚜虫只有针眼般大小,在10倍放大镜下我们可以看清它们的肢体。6、月球是一个不发光、不透明的球体,我们看到的月光是它反射太阳的光。3、米饭里面的主要成分是淀粉。米饭淀粉遇到碘酒,颜色变成蓝色,这种蓝色物质是一种不同于米饭和淀粉的新物质。第一单元 微小世界2、如果我们想要设计一个合理、清洁的垃圾填埋场,我们首先应考虑要解决的问题有哪些呢?15、在显微镜下,我们看到了叶细胞中的叶绿体,还看到了叶表皮上的气孔。1、说说你身边物质变化的例子。答:我
2、们每个人要做到不乱扔果皮,不随地吐痰,爱护花草树木,搞好环境卫生,保护好身边的环境。力争做一个环保小卫士,向身边的人宣传和倡议环保。I have a dreamGood morning/afternoon, everyone, Today I feel very happy to be here and give the speech. The topic of my speech is “I have a dream”. I have a dream that one day all the people will live peacefully all over the world. Th
3、ere will be no wars any more. People will be friendly to each other. I have a dream that one day there will be no pollution. The sky will be blue and clear. The air will be pleasant to smell. And the fish will swim happily in the river. I have a dream that one day I will not have a lot of homework.
4、I will have enough time to do what I like to do. I will enjoy the after-class activities and have the chance to travel to many beautiful places. I have a dream that one day my parents can treat me as an adult. When they decide to arrange something for me, they will follow my advice. I hope there will be a better understanding between us. I have a dreamthank you!大家早上/下午好: 今天我很高兴在这里演讲,我演讲的题目是“我有一个梦想”。 我有一个梦想:有一天全世界一片和平。再没有战争,人们相处融洽。 我有一个梦想:有一天再没有污染。天空碧蓝透亮。空气清新健康。鱼儿在水里畅游。 我有一个梦想:有一天不再疲于应付作业。我能有足够的时间去做我喜欢的事。我能享受课外的活动并有机会去很多美丽的地方旅游。 我有一个梦想:有一天我的父母能和我平等相待。在为我安排各项事情时能征求我的意见。相互之间充满理解。我有一个梦想谢谢!