G1½型定位环用于直径（）的定位管。A、φ34mm B、φ36mm C、φ48mm

A study of more than five million books, both fiction and non-fiction, has found a marked decline in the use of emotional words over time. The researchers form the University of Bristol used Google Ngram Viewer, a facility for finding the frequency of terms in scanned books, to search for more than 600 particular words identified as representing anger, dislike, fear, joy, sadness and surprise.

They found that almost all of the categories (类别) showed a drop in these “mood words” over time. Only in the category of fear was there an increase in usage.

“It is a steady and continuous decrease,” said Dr Alberto Acerbi. He assumed that the result might be explained by a change in the position occupied by literature, in a crowded media landscape. “One thing could be that in parallel to books the 20th century saw the start of other media. Maybe these media—movies, radio, drama—had more emotional content than books.”

Although both joy and sadness followed the general downwards trend, the research, published in the journal PLOS One, found that they also exhibited another interesting behaviour：the ratio (比率) between the two varied greatly, apparently mirroring historical events.

During the Roaring Twenties the joy-to-sadness ratio reached a peak that would not occur again until before the recent financial crash. But the ratio plunged at the height of the Second World War. Nevertheless, the researchers held a reserved opinion about their claim that their result reflected wider social trends. In the paper, they even argue that the reverse could be true.

“It has been suggested, for example, that it was the suppression (压抑) of desire in ordinary Elizabethan English life that increased demand for writing ‘filled with romance and sex’… perhaps,” they conclude, “songs and books may not reflect the real population any more than catwalk models reflect the average body.”

(Note：Answer the questions or complete the statements in NO MORE THAN TEN WORDS.)

小题1:A study of more than five million books indicated a decline in “mood words” over time except       

小题2:According to Dr Alberto Acerbi, one reason for the drop of “mood words” in books may be that     

小题3:What were the two periods when the joy-to-sadness ratio was at its highest?

小题4:While the researchers found some changes in the use of “mood words” in books, they werenot sure that       

选择使用内部留存利润进行再投资的方式属于( )。

A．内部融资

B．债权融资

C．股权融资

D．资产销售融资

哪种类型的灯不能用做紧急照明？（）

A．白炽灯

B．荧光灯

2004年6月7日，甲空调厂在某报纸刊登广告，声称：6月10日—15日，在乙商场开展空调特价优惠活动，A型空调原价4000元，现价2000元，特供数量2000台；B型空调原价7000元，现价3500元，特供数量1000，台。6月9日，甲空调厂在该报纸上又刊出广告，声称：因工厂准备不足，现取消6月10日—15日B型空调特惠活动，并表示歉意。张先生偶然看到6月7日的某报纸，即取钱到乙商场要求购买A型或B型空调，却被销售人员告知：A型空调2000台6月10日当日即全部售完，现无货可卖；B型空调特惠活动早巳被取消。下列陈述中正确的是：

A．甲空调厂不构成违约，广告仅是要约邀请，合同未成立

B．甲空调厂就“B型空调特惠”事项不构成违约，因为甲已在活动开始前取消了活动中这一部分

C．甲空调厂就“B型空调特惠”事项构成违约，因为甲无权取消活动中这一部分

D．甲空调厂就“A型空调优惠”事项不构成违约

奥地利著名经济学家熊彼得曾经提出“领地国家”的概念，其中“领地国家”的特征是：在封建制度下，国王的税收有两个来源，一部分来自国王自己的领地，一部分来自诸侯的进贡；国王则无权直接对诸侯领地进行征税。根据这个概念，对古代中国处于“领地国家”时期叙述正确的是（）

A.实现了以家天下为核心的集权机制

B.构建以血缘关系为基础的文化心理认同

C.形成了地方绝对效忠中央的制度

D.确立了以土地国有为基础的社会公有制