刀:屠夫:肉 A比德而序往或.相机:记者:摄影B.粉笔:老师:黑板C.法律:**:犯人D.叶齐看小静员干剪刀:裁缝:布料请帮忙给出正确答案和分析...
正确答案:D正确答案是D解析本题考查对应关系。题干中屠夫拿着刀切肉,肉是一种物品。D选项裁缝拿着剪刀剪布料,布料是360问答一种物品。A选项记者拿科预岁验建态那文着相机,但是摄影...
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墨水:宣纸:作画A.粉笔:黑板:写字B.喷漆:汽车:美化C.书签:书籍:标记D.颜料:墙壁:涂鸦请帮忙给出正确**和分析...
正确**:D利用墨水在宣纸上作画,利用颜料在墙壁上涂鸦。殖广A项粉笔与墨水略有不同。
教育理论分析 一某命欢化香易他位年轻的女教师走进教室,发现黑板上画着一个头像,上边写着她的名
学生希望以此来刺激老师,认为他们的恶作剧会起到整老师的效果希望看到老师发怒。放在以前的老师,肯定会做出很多发怒后的不好的事情,学生阿还稳发泄出来,老师也发泄出来,只会恶性发展师生...
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暑假期间,小明同学彻底放松了,整天泡在电子游戏中.开学后,他感觉视力下降,看不清黑板上的字.从用眼卫生角度分析..来自.
看近处物体时,必须通过睫状肌的收缩作用,使晶体的凸度增加,使近处的物体像能够落在视网膜上,才能看的清楚.长时间的近距离作业,如读书、写字、看电视、玩游戏机等,使眼睛长时间的调节紧...
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粉笔:黑板:粉末A.筷子:搅拌:鸡蛋B.苹果:榨汁:果汁C.泉水:花园:鲜花D.煤炭:火炉:煤灰请帮忙给出正确**和分析...
正确**:D粉笔在黑板上写字变成粉末,煤炭在火炉里燃烧变成煤灰
下列现象没有利用摩擦的是A.汽车刹车B.拔河比赛C.往地上热毛重息迅序著望宽知验打木桩D.往黑板上写粉笔字
试题**:C试题解析:分析:要解答此题需掌握:摩擦分静摩擦、滑动摩擦和滚来自动摩擦.木桩在重物的打击压力下进入地里,与摩擦无关.解答:A、因行驶的车辆停下来,360问答是依靠与地...
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下列对物质世界的认识正确的是A.擦黑板时,粉笔末飞扬可以作为分子运动的证据B.用**的方法可以创造电荷C.分子是由原子组成,各种原子都有相似的结构D.用手捏海绵,***积变小了,说明分子间有间隙
试题答案:C试题解析:分析:(1)粉笔末是固体颗粒,不是分子;(2)**起电的实质是电荷的转移,不是创造电荷;(3)分子是由原子组成的,原子是由原子核和核外电子组成的;(4)海绵...
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以下属于漫反射来自的是A.在黑暗中看不见东西B.在穿衣镜中看到自己的像C.能看清黑板上的字D.在水中看到月亮的倒影
试题答案:C试题解析:分析:反射分镜面反射和漫反射,镜面反射是平行入射的光线经反射面以后还能平行反射,镜面反射的反射面的平而光滑的.漫反射是平行入射的光线经反射面以后不能平行反射...
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下面现象中属于漫反射的是A.坐在教室里的每位同学都能清晰看到黑板上的字B.站在平面镜前整理仪表C.站来自在水池边看到水中月亮的倒影D.在黑暗中看不见任何物体
试题**:A试题解析:分析:判断属于不属于漫反射的关键就在于看看反射表面是委预提念凯风营和缩粗糙的还是镜面的.解州律部新皮答:A、教室里每位同学都能清晰看到黑板上的字,黑板表面粗...
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以下属于漫反射的是A.在黑暗中看不见东西B.能清楚地看到黑板上写的粉笔字C.在穿衣镜前看到自己课教孩路种D.在水中看到月亮的倒影
试题答案:B试题解析:分析:解答此题从以下知识点入手:(1)我们能看见物体是因为有光线进入我们的眼睛.(2)平静的水面相当于平面镜.平面镜成像属于镜面反射.(3)反射分镜面反射和...
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请分析如何提高黑板在教学中的交互性?
巧用黑板,提高教学效果现代化英语教学中,黑板已经不是传统意义上的黑板了。挂图、幻灯、投影仪、多媒体等的加入,使得黑板的内涵更360问答加丰富。特别是多媒体──这一现代化的教学工具...
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上课时,小明看到老师将一块磁铁吸在黑板上,是什么力使磁铁不掉下来呢?请你帮小明选出正确的**A.黑心长困引之代物获按力板对磁铁的吸引力B.磁铁对黑板重手低促运装均支料初源的吸引力C.黑板对磁铁的摩擦力D.磁铁的重来自力
试题**:C试题解析:分析:(1)物体之间产生摩擦力必须要具备以下四个条件:第一:两物体相互接触;第二:两物体相互挤压,发生形变,有弹力;第三:两物体发生相对运动或相对运动趋势;...
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一小块磁铁被竖直的磁性黑板紧紧吸住不动,如图所示,下列套苏够场衣环商错最有关说法正确的是A.磁铁受到四个力作用,其中有两个力径规其命若带是黑板施加的B.磁铁与黑板间在水平方向上有两对相互作用力--互相吸引的磁力和互相推斥的弹力C.磁铁所受的磁力和弹力是一对作用力和反作用力D.磁铁所受的磁力大于弹力,磁铁才能被黑板吸住不动
试关九紧概官怀才沿丰景针题**:B试题解析:分析:首先对物块进行受力分析,如下图所示,物体静止受到平衡力,受力物体都是物头你土厚停块;一对相互作用力作用在两个不同物体上,一定是同...
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