The topic is, playing cards, comparing sizes. Group a is 10.7.5. Group b is 2.6.8. If you change 2 in group B,

Playing cards refer to all kinds of playing tools and ideas, patterns or words made of paper or plastic sheets. More common are playing cards (from abroad) and plates (from China). The shapes, specifications and quantities of playing cards are different from those of early countries, such as Italy, Germany, Spain and France, with 22, 32, 40 and 52 cards respectively. 54 playing cards are developed from the 52-card model founded by 1392 in France, plus King and Xiao Wang. Since then, the number of playing cards in various countries has gradually unified into the current 54-card model. There are many theories about the origins of poker, among which the most accepted one is that modern poker originated from "Ye Zi Xi" in China. By the Qing Dynasty, the style and style of Yezi Opera were basically perfect, and there was a saying that it gradually evolved into a horse brand. Therefore, in the history of science and technology in China, Dr. Needham attributed the invention right of the bridge to China people.

There are 54 cards in a deck of playing cards, of which 52 are real cards and the other 2 are trump cards (king and Xiao Wang). The 52 official cards are divided into a group of 13, and each group is represented by four colors: spades, hearts, clubs and diamonds. Each group of cards includes 10 (A stands for 1) and 13 cards marked with J, Q and K, and the gameplay is ever-changing.

The 54 patterns of playing cards are also wonderful to explain: the king represents the sun, Xiao Wang represents the moon, and the remaining 52 cards represent 52 weeks in a year; Heart-shaped, diamond, plum blossom and spades symbolize spring, summer, autumn and winter respectively. There are 13 cards in each suit, which means there are 13 weeks in each season. If J, Q and K are regarded as 1 1, 12, 13, then the king and Xiao Wang are half points, and the total number of playing cards is exactly 365 points (this year is a leap year, and the big and Xiao Wang are counted as 1 point respectively, * * 35. A deck of cards can be divided into red (hearts and diamonds) and black (flowers and spades). It is generally believed that the design and invention of playing cards are inextricably linked with astrology, divination, astronomy and calendar.

J, Q and K in playing cards are abbreviations of attendants, queens and kings in English, and 12 headcards respectively represent someone in history.

A is the first card representing various colors, and only one symbol representing that color is printed on this card. In most card games, including bridge, A is the highest level card; It is also the biggest card in all colors. The British once used spades as a sign of paying taxes.

I hope it can help you solve the problem.