透析"大学生就业难"

我国现进入了"就业高压期"."大学生就业难"的关键根源在于本国当期极端严峻的就业形势.     

加工贮存全蝎的技术与方法

对于收购,加工全蝎可以在清明、谷雨二个季节之间进行。这时蝎子冬眠后.刚开始活动,腹中食物特少,没进行交配怀籽,出成品较高,每kg活蝎可得成品干蝎0.6—0.7kg。色泽纯正,称为“春蝎”,为全蝎中上等。其后的“伏蝎”和“秋蝎”腹中含杂质多,加工后色泽和质量远远比不上“春蝎”。 活蝎要及时加工。已死的蝎子要剔除,活蝎加工成的全蝎颜色为暗棕红色,死蝎加工后为青黑色,容易变质,不利贮存。 全蝎属动物类药材,体内含有大量动物蛋白,煮制前要用20％的淡盐水浸泡,煮制时,要把化好的,盐蝎比例为2:     

Centrality dependences of the pseudorapidity distributions of charged particles in Au+Au collisions at RHIC energies

By employing the Glauber model, we give the centrality dependences of the numbers of participants and binary nucleon-nucleon collisions in nucleus-nucleus collisions. By taking into account the energy loss of the participants in their multiple collisions, we then present the pseudorapidity distributions of charged particles in nucleus-nucleus collisions as a function of beam energy and impact parameter. Finally, we analyze the centrality dependence of the pseudorapidity of the charged particles in Au＋Au collisions at energies from √SNN=19.6 to 200 GeV. The theoretical results are in good agreement with the experimental observations of the RHIC-PHOBOS collaboration.