下列运算正确的是（ ） A．2a2+a=3a3 B．2a-1=12a C．（-a）3×

Questions from 36 to 40 are based on the following passage: A garment label is more than just a piece of fabric. It is something that draws the attention of customers to the garment. In today’s times, labels actually help in selling a garment. Customers decide whether to buy a piece of apparel or not on the basis of its label. Labels communicate to the customer what types of materials have been used in making the garment. Different manufacturers use their own special type of labels to create their own distinct identity. A label might be custom-made by a manufacturer to make it unique. Beautiful, customized labels add to the beauty and style of the garment. Each brand produced by the manufacturer is usually distinguishable on the basis of a special symbol, color or word. This is reflected through the label. Garment labels can be made using several fabrics, in different types of finishes and can be attached to the garment in different styles. The fabrics that are commonly used in the preparation of labels are satin, damask, semi-damask and taffeta. In some cases, cotton, canvas and felt are also used in making labels. Satin is the most used fabric in preparing labels. Leather labels are generally used in case of jeans and pants. PVC labels are used in pants and bags. Satin is soft on the skin and looks very pretty initially. However, it is not one of the best fabrics to be used in labels because it is very thin and can snag easily. Labels made using taffeta are stiffer than those of satin and do not snag as easily. However, taffeta labels can irritate the skin of the customers. Damask and semi-damask are ideal fabrics for making labels. Damask labels are soft even after finishing and do not cause any irritation to the customer. Semi-damask is similar to damask in feel, but it costs lesser than damask.

The most used fabric adopted in the labels is（）

A．felt

B．semi-damask

C．satin

D．leather

根据《会计档案管理办法》的规定，企业季度财务会计报告的保管期限应为（）年。

A．3

B．5

C．10

D．15

人民法院作出判决，宣告某公民死亡，三天后该公民出现。在此种情况下，该公民或者利害关系人，可以采用选项所列的哪种程序和办法，撤销或改变原判决()

A．向原审人民法院提出申请，由人民法院适用宣布死亡案件审理程序作出新判决，撤销原判决

B．向原审人民法院提出再审，人民法院适用再审程序作出新判决，撤销原判决

C．向原审人民法院的上级人民法院提出上诉，由上级人民法院适用二审程序予以改判

D．请求原审人民法院适用普通程序对案件进行审理，改变原判决

19世纪末20世纪初，资产阶级革命派建立的第一个革命团体是（）

A.光复会

B.华兴会

C.兴中会

D.同盟会

如右图所示是某质点做直线运动的v－t图象，由图可知这个质点的运动情况是：（）

A.前5s做的是匀速运动

B.5s～15s内做匀加速运动，加速度为0.8m/s²

C.15s～20s内做匀减速运动，加速度为0.8m/s²

D.质点15s末离出发点最远，20秒末回到出发点