关于焦点叙述错误的是（）. A.灯丝正面的电子形成主焦点 B.聚焦槽的形状和深度影响

(12分)在△ABC中，｜AB｜＝｜AC｜，∠A＝120°，A（0，2），BC所在直线方程为x－y－1＝0，求边AB、AC所在直线方程．

A recent study shows that gossip（流言蜚语）is more powerful than truth．It suggests people believe what they hear through the grapevine(小道消息)__36__they have evidence to the contrary．

Researchers, __37__students using a computer game, also found gossip played an important role when people __38__ decisions．"We show that gossip has a strong __39__, even when people have __40__ to the original information as well as gossip about the same information．Thus, it is __41__ that gossip has a strong controlling potential," said Ralf Sommerfeld, who led the study．

In the study, the researchers __42__ the students money and allowed them to give it to others in a series of rounds．The students also wrote __43__ about how others played the game that everyone could review．Students tended to give __44__ money to people described as “scrooges (吝啬鬼)” and more to those described as “__45__ players”．“People only believed the gossip, not the past decisions," Sommerfeld said in a telephone interview．

The researchers then took the game a step_46_and showed the students the actual decisions people had made．But they also supplied false gossip that contradicted that __47_．In these cases, the students_48_ their decisions to award money on the gossip, __49__ the hard evidence．

“If you know what the people did, you should care, but they still __50__ what others said,” Sommerfeld said．Researchers have __51__ used similar games to study how people cooperate and the __52__ of gossip in groups．Scientists define gossip __53__ social information spread about a person who is not __54__．In evolutionary terms, gossip can be an important tool for people to __55__ information about others' reputations or find the way through social networks at work and in their everyday lives．

36．A．in case     B．for fear that     C．as if  D．even if    

37．A．testing     B．checking C．examining       D．experimenting

38．A．draw       B．make       C．reach       D．conclude

39．A．impression      B．difference       C．influence D．function

40．A．access      B．entrance   C．charge     D．communication

41．A．curious    B．serious     C．obvious    D．worth

42．A．impressed      B．asked       C．showed    D．gave

43．A．articles    B．notes       C．dairies     D．letters

44．A．less B．more       C．fewer       D．much

45．A．general    B．mean       C．generous D．outgoing

46．A．away       B．forward   C．ahead       D．further

47．A．existence B．evidence C．confidence      D．dependence

48．A．based       B．put   C．focused    D．passed

49．A．more than       B．less than   C．rather than      D．other than

50．A．referred to      B．listened to       C．turned to D．stuck to

51．A．soon        B．presently C．far    D．long

52．A．strength   B．energy     C．effect     D．force

53．A．as     B．for   C．to     D．by

54．A．absent      B．present     C．gone  D．missing

55．A．achieve    B．earn C．acquire    D．win

关键性的销货单、销售发票、发运凭证等都应事前按顺序编号使用，以防止遗漏开票或记录销售业务，防止重复开票或记账，这种控制措施属于______。

A．职责分工控制
B．业务授权控制
C．实物控制
D．凭证与记录控制

上市公司股本增加的形式主要有（）

A、送股

B、转增股

C、配股

D、合并

E、回购

下列哪一个与数据库日志无关

A．保障事务原子性

B．保障数据库一致性

C．故障后恢复

D．死锁检测