记账凭证既是记录经济业务发生和完成隋况的书面凭证，也是登记账簿的依据。（）

仁寿县交警大队一辆警车沿着一条南北方向的公路巡视，某天早晨从A地出发，晚上到达B地，约定向北为正方向，当天行驶记录如下（单位：千米）+18.3，﹣9.5，+7.1，﹣14，﹣6.2，+13，﹣6.8，﹣8.5．问：

（1）B地在 A地哪个方向？相距多少千米？

（2）若该警车每小时蚝油3.35升，那么该天共耗油多少升？（结果保留两个有效数字）

（3）若油箱中有250升油，中途是否需要加油？若需要，至少加多少升？

如图所示，矩形区域中虚线为静电场中的一簇等势线．己知某粒子以初速度v₀沿与等势线平行的方向由A点进入电场，刚好自c点以速率v_t离开电场，设粒子只受电场力，则下列说法中正确的是（　　）

A．若只增大v₀，粒子将从dc边离开电场，离开电场的速率可能大于v_t

B．若只增大v₀，粒子将从bc边离开电场，离开电场的速率大于v_t

C．若只减小v₀，粒子将从dc边离开电场，离开电场的速率小于v_t

D．若只减小v₀，粒子将从bc边离开电场，离开电场的速率小于v_t

用万用表测试某电路中一个NPN型三极管的静态工作电压时，当UCE≈UCC时，可断定管子处于（）状态。

A．放大

B．饱和

C．短路

D．截止

To many Americans，Labor Day marks the end of the summer，a day off from work and school，and one last chance to relax．But Labor Day is much more than just a day off . It represents a very important victory for laborers everywhere．The holiday is a celebration of the social and economic achievements of American workers．

More than a century ago，workers were forced to deal with harsh conditions．They were paid very little, and they often worked 10-to l2-hour days．Men, women and even small children were forced to work even when they were sick．Tired of long hours and dangerous conditions，workers began organizing themselves into labor unions．On top of fighting for higher pay and shorter workdays，they also fought for the rights of children．The workers wanted employers to place limits on the age of their workers so that small children were not overworked or hurt in factories．

A New York City carpenter named Peter McGuire is credited for coming up with the idea for Labor Day．In 1872，after working many hours under poor conditions, McGuire rallied 100,000 workers to go on strike．The workers marched through the streets of New York City，demanding a better work environment．McGuire spent a decade fighting for workers’ rights．In 1882，he proposed the idea to create a special holiday for workers．On Tuesday，September 5，1882．more than 10,000 workers hit the streets of New York City for the first ever Labor Day parade．Two years later the celebration was moved to the first Monday in September．And in 1894，Congress passed a law making Labor Day a national holiday．

Americans celebrated the first Labor Day holiday with a parade，picnics and fireworks．Today，many people hit the road to enjoy the last of their summer vacation．Others enjoy the long weekend with picnics，backyard barbecues or just rest and relaxation．However you spend Labor Day，remember that the holiday is a time to pay tribute (致敬)to the workers who have made America what it is today．

小题1:What do we know from Paragraph 1 ?

A．Americans have more than a day off on Labor Day．

B．Many countries in the world celebrate Labor Day．

C．Labor Day has a deep meaning for American laborers．

D．Labor Day shows the social and economic power of America．小题2:What is Paragraph 2 mainly about?

A．American workers’ fighting against their employers．

B．The bad life that American workers 1ed．

C．How American employers treated their workers．

D．The life that American workers ever expected．小题3:The underlined word “rallied” in Paragraph 3 can be replaced by“___________”．

A．persuaded

B．supported

C．rewarded

D．gathered小题4:Which of the following statements is TRUE according to the passage?

A．There were about 100,000 workers in New York City in 1872．

B．Labor Day became a national holiday in 1884．

C．In 1872 Labor Day was first put forward by McGuire．

D．The first ever Labor Day parade was held in 1882．小题5:According to the author，while spending Labor Day，Americans should feel _________ ．

A．surprised

B．thankful

C．dissatisfied

D．superior

女性，40岁。半年前因突发呕新鲜血1800ml，住院治疗。并确诊为门脉高压症，保守治疗好转后出院。本次因大量呕血再次住院，经三腔二囊管压迫止血等综合治疗6天后出血停止24小时，拔除三腔二囊管后，又发大出血。

此病人首先易并发

A．腹胀、腹泻
B．肝衰
C．腹疼、腹胀
D．心衰
E．肾衰