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下列四个图象能正确反映其对应实验操作的是( )
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下列图象能正确反映其对应操作中各量变化关系的是
下列四个图象中能正确反映对应变化关系的是
下列四个图象能正确的反映对应的实验操作的是
下列四个图象能正确反映其对应实验操作的是
同等质量、等浓度的双氧水分别制氧气
加热一定量高锰酸钾试管中固体质量变化
加热氯酸钾和二氧化锰制氧气时二氧化锰的质量
电解水一段时间
以下四个图象能正确反映对应变化关系的是
①加热一定质量的高锰酸钾
②将镁片放入硝酸铜溶液中
③木炭在密闭的容器内燃烧
④电解水生成两种气体
下列四个图象能正确反映实验变化关系的有
下列四个图形图象中能正确反应其对应实验操作的是
下列图象能正确反映其对应的实验操作的是
如图四个图象能正确反映对应的变化关系的
②④
①②
③④
①③
下列四个图象分别对应四个变化过程的一种趋势其说法正确的是①表示在等质量的铁粉和锌粉中分别加入足量的溶
上述图象只有2个正确
上述图象只有3个正确
上述图象全部正确
若将图②中的纵坐标改为固体总质量,该图象能正确反映相应的变化趋势
下列所示的四个图象中能正确反映对应变化关系的图象个数有①电解水②向稀硝酸和硝酸铜的混合溶液中滴加Na
1个
2个
3个
4个
下列四个图象反映的变化趋势分别对应四种操作过程其中正确的是
下列四个图象中能正确反映对应实验操作的是
向一定质量的饱和石灰水中不断加入生石灰
向等质量的锌和铁中滴加足量的质量分数相等的稀盐酸
用等质量浓度的过氧化氢溶液在有无催化剂条件下制取氧气
向一定质量的氢氧化钾和硝酸钡的混合溶液中滴加稀硫酸
下列四个图象能正确反映其对应操作的是
下列四个图象能正确反映其对应实验操作的是
下列四个图象能正确反映对应变化关系的是
下列四个图象中能正确反映匀速直线运动规律的是
下列图象能正确反映其对应操作中各量变化关系的是
下列四个图象分别对应四种操作过程其中正确的是
如图四个图象能正确反映对应的变化关系的
②④
①②
③④
①③
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如图菱形ABCD的对角线AC与BD相交于点OFO⊥平面ABCD四边形OAEF为平行四边形. Ⅰ求证平面DEF⊥平面BDF Ⅱ若AB=FO=BD=2点H在线段BF上且=λ三棱锥B﹣AHC的体积等于三棱锥O﹣DEF的体积求λ的值.
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