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NOT CLOGGED | MODEL CONSTRUCTION
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NOT CLOGGED | MODEL CONSTRUCTION
A metal is treated with dil. H(2)SO(4). The gas evolved is collected by ...
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改变内能有不同的方式.图7(甲)是在一个配有活塞的厚壁玻璃筒里放一小团蘸了乙醚的棉花.当迅速压下活塞时.可看见筒内棉花燃烧起来.这是通过 ...
7．图为心脏结构图.根据心脏和血管的知识判断下列说法正确的是( )A．当血液流经小动脉的时侯.才能够与其它组织细胞进行物质交换B．心脏四个腔中 ...
![finding.materials:general.lab.equipment:retort.stand [PEN wiki]](https://eburn.scripts.mit.edu/pened/lib/exe/fetch.php/finding.materials/general.lab.equipment/pen_materials_retort_stand.jpg?w=500)
