第五届cctv舞蹈大赛
获奖名单
科粤版初中化学上册知识点总结Chemistry for Middle School (Volume 1) Summary of Knowledge
Experimental n
I。Common Instruments
XXX。Separatory XXX。Ordinary XXX。Alcohol Lamp。Iron Stand。Beaker。Test XXX。Graduated Cylinder。Rubber Dropper。XXX.
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1.Instrument n
小龙女的秘密Instruments XXX into those that can be heated and those that cannot be heated。Instruments that can be heated include those that can be directly heated and those that can be indirectly heated.
Directly heated instruments (2 types): Test tubes。Evaporating dishes (small bottom。small capacity).
Indirectly heated instruments (2 types) (XXX): Beakers。Conical flasks (large bottom。large capacity).
2.Glass XXX.
3.Separatory funnels XXX-necked funnels。separatory funnels。and ordinary funnels.
4.The tray balance has the principle of "left object。right code。and mass left = mass right + mass code."
II。Experimental n
1.(I) Taking drugs
1.Principles for taking drugs:
饲料级氧化锌1) The Three Do Not's Principle: Do not touch drugs with your hands。do not put your nose close to the container to smell the drug's odor。and do not taste any drug.灰铸铁
牌号>pitstop
2) "Handling Principles" for remaining drugs: Experimental remaining drugs should not be put back into the original bottle。randomly discarded。or XXX.
2.Principles for taking solid drugs: One level。two put。three slow stand (do not directly put the test tube in to avoid the bottom of the test XXX breaking).
3.Principles for taking liquid drugs:
1) When pouring liquid drugs。the bottle cap should be turned over (XXX)。the label should be facing the palm (to prevent the label from being corroded by the drug)。and the XXX should be close to the XXX).
2) Liquid measurement (graduated cylinder。rubber dropper)
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