在第十六

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。

He wrote about 45 Italian operas, including Giulio Cesare (1723), Orlando (1733), and Alcina (1735). His oratorios include Israel in Egypt (1739), Saul (1739), and Jephtha (1752). His church music includes the Chandos Anthems (1718) and Coronation Anthems (1727). His orchestral works include the famous Water Music (1717) and Royal Fireworks Music (1749), the 18 concerti grossi of Op. 3 and Op. 6, and 17 organ concertos.

他的作品有︰近四十五部义大利歌剧，包括了《朱利奥E凯撒》（1723）、《奥兰多》（1733）和《阿尔其纳》（1735）；神剧包括了《以色列人在埃及》（1739）、《扫罗》（1739）和《耶弗他》（1752）；教堂音乐包括了《钱多斯赞美歌》（1718）和《乔治二世加冕赞美歌》（1718）；他的管弦乐作品有著名的《水上音乐》（1717）和《皇家火焰音乐》（1749），第三号《大协奏曲六首》和第六号《大协奏曲十二首》及十七首管风琴协奏曲。

Article 46 A motor vehicle shall pass a railway crossing according to the traffic signals or the traffic manager's command; if there is no traffic signal or traffic manager, it shall slow down or stop, and may not pass until believing that it is safe to do so.

第四十六条机动车通过铁路道口时，应当按照交通信号或者管理人员的指挥通行；没有交通信号或者管理人员的，应当减速或者停车，在确认安全后通过。

In the thirty-sixth year of Asa's reign, Baasha, king of Israel, attacked Judah and fortified Ramah to prevent any communication with Asa, king of Judah.

阿撒当国第三十六年，以色列王巴厄沙来进攻犹大，在辣玛修筑工事，防止人同犹大王阿撒来往。

A dreary rain was falling as Celia's taxi stopped at a dingy six-storey building on Thirty-seventh street.

令人沉闷的细雨中，西莉亚坐的出租车在第五十七号街的一座破旧和肮脏的六层楼前停住了。

Patrick O'Brien stood on the sixty-ninth floor observation roof of the RCA Building in Rockefeller Center and looked off to the south.

帕特里克奥布莱恩站在第六十九楼的RCA大楼屋顶观察洛克菲勒中心，并期待过南方。

Professor Moses Chan will be conferred the Doctor of Science, honoris causa, Ms. Kuang Jianlian (Hung Sin-nui) will be bestowed the Doctor of Letters, honoris causa , Mr.

浸会大学将於二00五年十一月八日举行的第四十六届毕业典礼上，颁授荣誉博士学位予陈鸿渭教授、邝健廉女士、谢安如先生和唐信教授，以表扬他们在学术、科研和专业上的卓越成就，以及对社会的贡献。

The Army Group North ordered the deployment of the army detachment "Narwa" on February 22 in the following positions: III SS Panzer Corps deployed to Narva, Ivangorod Bridgehead on the east bank of the river and north of Narva; the XXXXIII Army Corps against the Krivasoo Bridgehead south of the city and the XXVI Army Corps to the sector between the Krivasoo and Lake Peipus.

这个集团军北下令部署军队支队&纳尔瓦&2月22日在以下位置：第三装甲团部署到纳尔瓦，伊万哥罗德桥头东岸的河以北的纳尔瓦；的XXXXIII军团反对Krivasoo桥头以南城市和第二十六军团的部门之间的Krivasoo和湖佩普西湖。

The Army Group North ordered the deployment of the army detachment "Narwa" on February 22 in the following positions: III SS Panzer Corps deployed to Narva, Ivangorod Bridgehead on the east bank of the river and north of Narva; the XXXXIII Army Corps against the Krivasoo Bridgehead south of the city and the XXVI Army Corps to the sector between the Krivasoo and Lake Peipus.

這個集團軍北下令部署軍隊支隊&納爾瓦&2月22日在以下位置：第三裝甲團部署到納爾瓦，伊万哥羅德橋頭東岸的河以北的納爾瓦；的XXXXIII軍團反對Krivasoo橋頭以南城市和第二十六軍團的部門之間的Krivasoo和湖佩普西湖。

Section 2 Radical Revolution and Reaction During the first years of the revolution, a republic was established, Louis XVI was executed, and thousands of people were killed on suspicion of opposing the revolution.

第2自由基反应的革命在革命的第一年，中华人民共和国成立后，路易十六被处决时，与成千上万的人对反对革命的怀疑杀害。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。