设3阶矩阵，已知A的伴随矩阵的秩为1，则a=（）。 A.-2 B.-1 C.1 D. 发布时间：2017-07-20 17:16 │ 来源：www.tikuol.com 题型：单项选择题 问题： 设3阶矩阵，已知A的伴随矩阵的秩为1，则a=（）。A.-2B.-1C.1D.2
题型：单项选择题 阅读理解。Welcome to the zoo Come and meet the Indian (印度的) elephants and the new tigers from America. The bears are waiting to meet you, and the monkeys from China are waiting to throw things at you. The lovely dogsfrom Australia are waiting to laugh at you. The giraffes from Zambia are waiting to look down on. TicketsOpening timeAdults:＄2.00Children:＄1.00Under 12: Free Friday, 10:00a.m----3:00p.m. The other days9:00a.m----4:00p.m. Keep the zoo clean! Do not touch, give food to or go near the animals.根据短文内容完成选择。1. How many kinds of animals are talked about in the passage?A. Four B. FiveC. Six D. Seven2. Now Mr. Smith is in the zoo with his two sons, one aged 14 and the other 10. How much are the tickets altogether (总共)?A. ＄4.00 B. ＄2.00 C. ＄3.00 D. ＄1.003. Which of the following is a visiting time?A. 8:30 a.m. Monday. B. 9:30 a.m. Friday.C. 5:00 p.m. Tuesday. D. 2:00 p.m. Sunday.4. From the passage we can guess the animal "giraffe" must be very _____.A. fat B. long C. tall D. strong5. Which of the following can we do in the zoo?A. Take a few nice photos. B. Give some food to the fishC. Touch the monkey on the head. D. Throw things everywhere. 查看答案
，已知A的伴随矩阵的秩为1，则a=（）。，已知A的伴随矩阵的秩为1，则a=（）。