如果拍片时发现颌骨体内边缘清楚的卵圆形致密影，直径2～4mm，与牙根无关，应诊断为A

按被保险人的年龄分类，人身保险的种类包括( )。

A．老年保险和成人保险

B．健体保险和标体保险

C．儿童保险和成人保险

D．社会保险和商业保险

若D1=a₁，a₂，a₃)，D2=b₁，b₂，b₃，则D1×D2集合中共有元组______个。

When families gather for Christmas dinner, some will stick to formal traditions dating back to grandma’s generation. Their tables will be set with the good dishes and silver, and the dress code will be Sunday best.

But in many other homes, this china-and-silver elegance has given way to a stoneware (粗陶) and stainless informality, with dresses assuming an equally casual-Friday look. For hosts and guests, the change means greater simplicity and comfort. For makers of fine china in Britain, it spells economic hard times.

Last week Royal Doulton, the largest employer in Stoke-on-Trent, announced that it is eliminating 1,000 jobs－one-fifth of its total workforce. That brings to more than 4,000 the number of positions lost in 18 months in the pottery (陶瓷) region. Wedgwood and other pottery factories made cuts earlier.

Although a strong pound and weak markets in Asia play a role in the downsizing, the layoffs in Stoke have their roots in earthshaking social shifts. A spokesman for Royal Doulton admitted that the company “has been somewhat slow in catching up with the trend” toward casual dining. Families eat together less often, he explained, and more people eat alone, either because they are single or they eat in front of television.

Even dinner parties, if they happen at all, have gone casual. In a time of long work hours and demanding family schedules, busy hosts insist, rightly, that it’s better to share a takeout pizza on paper plates in the family room than to wait for the perfect moment or a “real” dinner party. Too often, the perfect moment never comes. Iron a fine-patterned tablecloth? Forget it. Polish the silver? Who has time?

Yet the loss of formality has its down side. The fine points of etiquette (礼节) that children might once have learned at the table by observation or instruction from parents and grandparents (“Chew with your mouth closed.” “Keep your elbows off the table.”) must be picked up elsewhere. Some companies now offer etiquette seminars for employees who may be able professionally but inexperienced socially.

67．Why do people tend to follow the trend to casual dining?

A. Family members need more time to relax.

B. Busy schedules leave people no time for formality.

C. People prefer to live a comfortable life.

D. Young people won’t follow the etiquette of the older generation

68．It can be learned from the passage that Royal Doulton is ________.

A. a seller of stainless steel tableware                      B. a dealer in stoneware

C. a pottery chain store                                                 D. a producer of fine china

69．The main cause of the layoffs in the pottery industry is ________.

A. the increased value of the pound                          

B. the worsening economy in Asia

C. the change in people’s way of life

D. the fierce competition at home and abroad

70．Formal table manners, though less popular than before in current social life, ________.

A. are still a must on certain occasions                     B. are certain to return sooner or later

C. are still being taught by parents at home                    D. can help improve personal relationships

段锋(1991年5月出生)于2007年8月与李琳(1990年8月出生)相识。建立恋爱关系后不到两个月，两人即在段锋的工厂单身宿舍同居。同居后，两人常因琐事争吵。2007年11月14日晚，李与段又发生争吵。段欲外出躲避，被李拉住不放。二人争吵时，住隔壁的赵某、韩某、王某等三人前来劝架。段因李不放手，恼羞成怒，威胁李再不松手，就将其衣服扯光。李仍不松手，段把李身穿的睡衣及内衣裤全部扯掉。赵某见状扔给李一件外衣。李因穿衣而松手后，段即走出宿舍。以后，两人继续同居，并仍常因生活琐事争吵。2008年5月”日，两人争吵时，段打伤了李。李去医院诊治，县医院诊断为轻伤。李为治疗而花费了2000余元医药费。李因感到与段不能再继续维持同居关系，于2008年6月13日向县法院提起民事诉讼。所提诉讼请求共两项，即要求段锋赔偿全部医药费，解除与段的同居关系。所提请求的主要理由，一是段锋系致伤责任人，医药费理应由其承担；二是两人经常争吵，并曾受当众扯光衣服之侮辱，两人同居无法维持。
县法院受理后经审查认为，被告人段锋打伤李琳及当众扯光其衣服的侮辱行为，已构成犯罪，因此决定将本案转刑庭处理。刑庭认为，本案系自诉案件，故在决定采用独任审判后，由审判员通知李琳作为刑事诉讼自诉人，并将其民事诉状作为刑事自诉书。同时告知段有权聘请辩护律师，但段表示不请律师。法院决定于2008年7月20日公开审理本案。开庭前一天，李琳告知法院，她不愿控告段犯罪，仍只想通过法院解除与段的同居关系并让段赔偿医药费。因开庭日期已定，县法院刑庭决定如期开庭。开庭审理时，只有段锋一人到庭。法庭审理时，只对段进行了讯问。讯问后，由于事实清楚，段锋亦全部承认，故未让段锋作最后陈述，随即当庭作出判决，对其以伤害罪和侮辱罪分别判处有期徒刑一年和两年，合并执行有期徒刑两年半，并告知段锋有上诉权及上诉期限，但对附带民事诉讼部分未作出处理。
根据上述案情，请回答以下问题：

虞翻被调到番禺时，在住处设帐讲学，门徒常数百人。是最早在岭南举办私学，传播中原文化的教育家。