Time as a Trade Barrier. The article discusses the National Bureau of Economic Research (NBER) Working Paper "Time as a Trade Barrier," by David Hummels and Georg Schaur. This repo... Brunel,Claire - 《Nber Digest》 被引量: 177发表: 2012年 Time as a trade barrier: Implications for low...
单词拼写1.I like this job not because of the high salary but because it can let me make full use of my a .2.After being d to make a big fortune, the young man left for the large city.3.As is m above, our global is becoming warmer, and as a resul
1.write down 2.to listen to 3.have visited 4.because of 5.got up 6.left 7.came out 8.as a result 9.surprising 10.to rest 【解析】 试题解析: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 考点:完成句子 练习册系列答案 新起点百分百单元测试卷系列答案 ...
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" You probably don't remember me " she said. Then she pulled out a piece of paper from her 1 and gave it to me. It was my handwriting. As the assistant of the Honors Programs at the university one of my 2 was to review stude
该研究计划采用双侧颈总动脉永久结扎术(bil ateral common carotid artery occlusion,BCCAO)建立慢性脑部缺血致认知功能障碍的VD大鼠模型,然后给予白藜芦醇(resveratrol,RSV)进行药物干预以观察其能否改善VD大鼠的认知功能,并探讨其在沉默调节蛋白1(Silent information regulation protein 1,SIRT1)/叉头盒蛋白3a(Forkhead-...
本研究以表面接枝聚乙二醇链的聚酰胺-胺树枝状大分子(PEG-PAMAM)为纳米载体,制备了两种分别用于光动力治疗和化学治疗的纳米药物,并探索了它们在肿瘤治疗中的应用。(1)... 李小杰,张洪吉,施冬健,... - 全国高分子学术论文报告会 被引量: 0发表: 2015年 基于树枝状分子的Toll样受体激动剂递送载体的构建及其性...
目的:探讨CD4^+CD25^+调节性T细胞(Tr)在反复自然流产发病机制中的作用.方法:应用流式细胞术检测29例原因不明的反复自然流产妇女(URSA组)和20例正常妊娠妇女(正常对照组)外周血中CD4^+CD25^+Tr的比例.结果:URSA组外周血中CD4...
Dynamical systems like the one described by the three-variable Lorenz-63 model may serve as metaphors for complex natural systems such as climate systems. When these systems are perturbed by external forcing factors, they tend to relax back to their equilibrium conditions after the forcing has shut...
Environmental Governance as Embedded Process: Managing Change in Two Community-Based Forestry Organizations. Peter Leigh Taylor,Antony S. Cheng. Human ... P Taylor,A Cheng - 《Human Organization》 被引量: 15发表: 2012年 Multilevel environmental governance: managing water and climate change in Europ...