一个留学生的人性之恶的故事

15天的小狗喂什么奶粉小狗的营养需求是比较高的，留学因此在喂养小狗的时候，留学要有计划的选择适合的奶粉，尤其是15天的小狗更需要特别注意喂养的质量和选择。

要说起海盗湾，生的事那也是个传奇。结果在2016年的一项调查中发现，人性研究结果显示，有21%的签名科学家的身份无法识别，19%的科学家自签名以后再没有在任何期刊上发表过任何论文。

但神奇地是，留学准确寻找到它的可用网址，已经成为从业者的标准技能。Sci-Hub有多火？在7月份，生的事宾夕法尼亚大学DanielHimmelstein及其同事研究发现，生的事Sci-Hub能够直接获取三分之二以上的学术论文，远远高于研究者Himmelstein的预期。虽然从官方的角度来说负面消息不间断，人性但是从业者却对它追崇备至。

然而，留学23%的签名科学家在签名以后仍继续在Elsevier的期刊上发表了论文（其中化学领域这一结果为29%，心理学为17%）。因此，生的事也就出现了Sci-Hub的网址东躲西藏的局面。

考虑到付费墙的存在，人性Sci-Hub具备有直接获取订阅式期刊上85%的已发表论文。

究其原因，留学可以用一句话来形容当下的期刊订阅状况——天下苦秦久矣。这篇文章为大家总结了材料领域期刊在过去五年间的影响因子，生的事为大家迎接2019影响因子做出一个铺垫。

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因为所涉及期刊众多，生的事差漏之处，请各位读者在评论区指出。接下来的六月，人性新的期刊影响因子即将出炉。