2016年12月国际形势大事述评

一、安理会通过涉朝第2321号决议，半岛无核化仍任重道远 2016年11月30日,联合国安理会一致通过第2321号决议,谴责朝鲜在2016年9月9日进行的核试验,重申朝应放弃核导计划,立即停止相关活动。决议通过了迄今为止最严厉的对朝制裁措施,宣布对朝煤炭出口设定上限,禁止朝出口铜、镍、银、锌等矿石,并对朝外交使团活动予以一定限制。

评价看图作文的误区

看图作文是小学作文中常用的一种作文形式。看图作文属于条件作文的范畴。因此,有些教师在评价看图作文时会陷入一个误区,即认为二凡是学生没能严格按照图中的内容作文或增添了原来图中没有的景物等,是胡编乱造,是错误的。我曾亲眼见过这样一个事实。

宽容,给孩子撑起另一片蓝天

刚刚从师范学校毕业的时候,我的邻居——一个从校长位置上退下来的老教师就提醒我说：＂老师不经意的一句话,可能会创造一个奇迹;老师不经意的一个眼神,也许会扼杀一个人才。＂起初,我对这句话不以为然,觉得这简直是危言耸听,是老师太拿自己当回事了。但是在工作中遇到这两个学生时,我渐渐体会到这句话所包含的道理。＂魅力＂作文应秀秀是我们班一个内向而文静的女孩,学习成绩上等,我一向很喜欢她。

Magneli phase titanium sub-oxide conductive ceramic Ti_nO_(2n-1) as support for electrocatalyst toward oxygen reduction reaction with high activity and stability

Magneli phase titanium sub-oxide conductive ceramic Tin O2n-1 was used as the support for Pt due to its excellent resistance to electrochemical oxidation, and Pt/Tin O2n-1 composites were prepared by the impregnation-reduction method. The electrochemical stability of Tin O2n-1 was investigated and the results show almost no change in the redox region after oxidation for 20 h at 1.2 V(vs NHE) in 0.5 mol/L H2SO4 aqueous solution. The catalytic activity and stability of the Pt/Tin O2n-1 toward the oxygen reduction reaction(ORR) in 0.5 mol/L H2SO4 solution were investigated through the accelerated aging tests(AAT), and the morphology of the catalysts before and after the AAT was observed by transmission electron microscopy. At the potential of 0.55 V(vs SCE), the specific kinetic current density of the ORR on the Pt/Tin O2n-1 is about 1.5 times that of the Pt/C. The LSV curves for the Pt/C shift negatively obviously with the half-wave potential shifting about 0.02 V after 8000 cycles AAT, while no obvious change takes place for the LSV curves for the Pt/Tin O2n-1. The Pt particles supported on the carbon aggregate obviously, while the morphology of the Pt supported on Tin O2n-1 remains almost unchanged, which contributes to the electrochemical surface area loss of Pt/C being about 2times that of the Pt/Tin O2n-1. The superior catalytic stability of Pt/Tin O2n-1 toward the ORR could be attributed to the excellent stability of the Tin O2n-1 and the electronic interaction between the metals and the support.

恋爱中的男人必须回答的问题

她问:"如果我和你母亲同时掉进水里,你先救谁?"从前也不是没有考虑过,只是,一样的最爱……他大窘,左手搓着右手:"说不出的。"这大概是所有恋爱中的男人都必须过的关口吧,可是,他却没能过去。"哄一哄我也好嘛!"她跺脚,几近落泪。最后她还是和他结了婚,却隐隐担忧。婚后第一个春节,依风俗,她应该去婆婆家过年,因为,她是他们家的人了。