设A为三阶方阵，其特征值分别为1，-2，-1，则|AT+E|=（）。 2022-06-30 设a→=（1,－1,3），b→=（2,－1,2)则3a→－2b→是（）。 2022-06-28 GenerationsofAmericanshavebeenbroughtuptobelievethatagoodbreakfastisonelife’sessentials.Ea 2022-01-07 Generations of Americans have been brought up to believe that a good breakfast is one life’s essentials. Eating 2022-01-07 About 35% of all high school graduates in America continue their education in an institution of higher learning. The 2022-01-07 Deep inside a mountain near Sweetwater in East. Tennessee is a body of water known as the Lost Sea. It is listed 2022-01-07 All the housewives who went to the new supermarket had one great ambition: to be the lucky customer who did not 2022-01-07 In Money Everything？ 2022-01-07 For each blank in the following passage, there are four choices given below and marked A, B, C and D. Choose 2022-01-07 一个箱子中有100个乒乓球,其中一等品97个,二等品3个.现从中任意取出5个乒乓球,其中恰有两个二等 2022-01-07