十五

Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.

镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。

H, or Palimpsest de Fleury (fourth or fifth century; at Turin), contains Mark, vii-xvi, 8 and Matt., i-xv; earliest form of Old Latin, African type, closely akin to text used by Saint Cyprian.

h后，或palimpsest后继德（第四或第五世纪，在都灵），包含商标，七-十六日， 8日和马特，一至十五；最早形成的旧拉美，非洲型，紧密类似于文本使用的圣塞浦路斯。

Bernard of Tuscany and of Lombardy, approved by Alexander VI (1497); the Congregation of Portugal, or of Alcobaca, founded in 1507; the Congregation of the Feuillants, founded by John de la Barriere in 1563, which spread into France and Italy, the monasteries of Italy, however, eventually detaching themselves from those of France to form the Congregation of the Riformati di San Bernardo; the Congregation of Aragon, approved by a Bull of Paul V (1616); the Congregation of Rome, or of Central Italy, created by a Decree of Gregory XV in 1623; the Congregation of Calabria and Lucania, established by Urban VIII in 1633, and to which was united the old Congregation of Flore, which had for its founder Blessed Joachim surnamed "the Prophet".

会众的庆祝圣伯纳德的西班牙，成立由DOM的马丁德巴尔加斯，在1425年，在蒙地附近的锡永托莱多；聚集的圣伯纳德的托斯卡纳和伦巴第，批准由Alexander六（ 1497 ）；众葡萄牙，或alcobaca ，创立于1507年；聚集了feuillants ，成立由约翰德香格里拉barriere在1563年，蔓延到法国，意大利等寺庙的意大利，但最终拆卸自己从那些法国形成聚集了riformati迪圣贝尔纳；聚集的阿拉贡，批准牛市的保五（ 1616年）；聚集罗马，还是意大利中部，创造了一项法令的格雷戈里十五，在1623个；聚集的卡拉布里亚和lucania成立了由市区八，在1633年，并以这是美国旧聚集flore ，这为它的创办人有福了约阿希姆姓"先知"。

Fifty-five years after he was buried here, his great-grandson, two-year-old Kevin, stopped by.

五十五年后的一个春天，他的两岁的曾孙来到了这里。

He had just completed his thirty-first year when he was called on, in 1659, to give himself entirely to the work of hagiography, in which he was to have a remarkably long and fruitful career, for it lasted till his death, which occurred in the eighty-seventh year of his age, and the fifty-fifth of his work in this field.

他刚刚完成了他的第31次年度的时候，他呼吁，在1659年，让自己完全的工作hagiography ，他在其中是有一个显着长期和富有成效的职业生涯，因为它延续到他死后，发生在80 -第七个年头的他的年龄，并在第五十五届的，他在这一领域的工作。

Ever since Holdfast platform established in September 2002, it accumulated more than 150 million registered users, with the latest record breaking peak concurrent users of over 700k.

自 2002 年 9 月以来，浩方对战平台已拥有超过一亿五千万的注册用户，目前日最高同时在线人数已突破创纪录的七十五万人。

Oct. 1, 2001 -- Adults have no monopoly on the ill effects of high blood pressure, according to two studies presented at the American Heart Association's 55th Annual Fall Conference of the Council for High Blood Pressure Research in Chicago.

根据两项在芝加哥第五十五届美国心脏协会秋季年会高血压会议所发表的报告研究显示，高血压所带来的病症效果不再是成年人的专利。

A 55-year-old woman has given birth to quadruplets in the Italian city of Mantua.

义大利曼图亚市一名五十五岁的妇女顺利产下四胞胎。

Silk tree is the arbor that silk tree of sensitive plant family belongs to, can amount to 15 meters of above high, 5, the flower that begins to give off tuft to form a cluster between June, damask stamen grows to be extended longly, the velvet of group of posse of look exactly like, also resemble Gong Ying, consequently again velvet flowers is cultivated, the another namer such as equestrian tassel flower.

合欢是含羞草科合欢属的乔木，高可达十五米以上，五。六月间开始放出一簇簇的花朵，淡红色的雄蕊长长地伸出，活象一团团的丝绒，也象红缨，因而又有绒花树，马缨花等别称。

When fishing in rocky waters five to fifteen feet deep, try ultra-light spinning tackle and a one-eighth-ounce yellow jig with a piece of night crawler at its tip.

当岩石水域的捕鱼五至十五脚深，尝试超轻纺纱处理，并一八盎司黄夹具与某一夜履带式及其尖端。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。