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Substance abuse - Wikipedia, the free encyclopedia
Use of these drugs may lead to criminal penalty in addition to possible physical, social, and psychological harm, both strongly depending on local jurisdiction.
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兩性物質(Amphoteric Substance) - 國科會高瞻自然科學教學資源平台
2009/8/22 - 兩性金屬會隨溶液pH值的變化,而產生不同的反應。例(I)顯示,鋁在強酸、強鹼中, 均能產生氫氣;例(II)中,鋅的氧化物(ZnO)會隨溶液pH值變化而 ...
http://case.ntu.edu.tw/hs/wordpress/?p=4708 -
Cathartic - Wikipedia, the free encyclopedia
Medicine[edit source | edit]. In medicine, a cathartic is a substance that accelerates defecation. This is in contrast to a laxative, which is a substance which eases ...
http://en.wikipedia.org/wiki/Cathartic -
Physical change - Wikipedia, the free encyclopedia
Physical changes are changes affecting the form of a chemical substance, but do not change the chemical composition of that substance. Physical changes are ...
http://en.wikipedia.org/wiki/Physical_change -
Ice - Wikipedia, the free encyclopedia
Ice is water frozen into a solid state. It can appear transparent or opaque bluish- white color, depending on the presence of impurities or air inclusions.
http://en.wikipedia.org/wiki/Ice
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