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  1. abbreviations - Usage of "p." versus "pp." versus "pg." to denote …

    Mar 1, 2011 · Per Strunk and White's Elements of Style, p. is used to denote 1 page, pp. to denote a range of pages. This form of citation is used when you are using brief/in text citations.

  2. PP 塑料和 PE 塑料有什么不同? - 知乎

    PP 塑料还具有与 PE 类似的特性,例如高耐用性、化学惰性以及用户安全性。 需要注意的一件小事是,你只能使用 PP 塑料盒在微波炉中加热 3 分钟左右。 因为PP塑料的耐热性很高,但耐 …

  3. PP 材料的优缺点有哪些? - 知乎

    PP材料概述: P材料,即聚丙烯,是一种由丙烯通过加聚反应而成的聚合物。它是一种无色、无臭、无毒、半透明固体物质,具有优异的物理性能、化学性能和加工性能。 PP材料的特点包括 …

  4. pp材质的性能和分类是什么? - 知乎

    PP材质,全称聚丙烯,是一种无毒无味的白色固体,具有耐热性、耐腐蚀性、密度小、可塑性强、加工容易等优点。 根据PP材质的不同特点和应用领域,可以将其分为以下几类: 1.高晶态聚 …

  5. Has been + PP vs Was + PP - English Language & Usage Stack …

    Apr 6, 2018 · I'm confused with below sentence, 1)She mentioned that it has been named as the Indian Wars. 2)She mentioned that it was named as the Indian Wars. First one is incorrect?

  6. PP材质和PP5材质哪个好? - 知乎

    食品级pp和pp5的主要区别在于,食品级pp是泛指pp材质的塑料制品。食品级pp通常会分为7个等级,而pp5是食品级pp中的其中一个品类。在众多的食品级pp材质塑料制品当中,经常看到的 …

  7. Usage of "p." vs "pp." to denote two separate pages

    Apr 7, 2020 · Usage of "p." vs "pp." to denote two separate pages Ask Question Asked 5 years, 3 months ago Modified 5 years, 2 months ago

  8. pp 材料和 pet 材料有什么区别? - 知乎

    PP:聚丙烯:感官鉴别:手感硬,有弹性,白色透明,透明度较高,常有胶带及印刷字。特性:耐热性好,可达120℃,耐酸碱腐蚀,可用于装酱油、醋等。 PET:是乳白色或浅黄色、高度结 …

  9. pp 和 pe 材质有什么不同之处? - 知乎

    熔点:PP的熔点较高,通常在155-170℃之间,而PE的熔点较低,大约在120-140℃之间。 这意味着PP在高温下的稳定性更好。 力学性能:PP在拉伸和弯曲强度上优于PE,表面硬度也较高 …

  10. So, we don't have "can have + PP" in English, do we? but we do …

    Jan 21, 2017 · I think this is more of a semantic than a grammatical constraint. It makes sense to talk about whether it is hypothetically possible that someone has done something; but I can’t …