已知x2一2x一1=0，则2 001x3-6 003x2+2 001x-7=( )． A: 0 B: 1 C: 2 008 D: 一2 008 E: 2 009

‍008 字符串交换 通过码‌

008 字符串交换 通过码

008 医院负荷 通过码

已知起航点经度λ1＝110°10＇.2W，到达点经度λ2＝118°08＇.1W，则两地间的经差Dλ为（）。 A: 007°57＇.9W B: 008°02＇.1W C: 007°57＇.9E D: 008°57＇.9E

已知起航点经度λ1＝124°15＇.7W，到达点经度λ2＝115°36＇.8W，则两地间的经差Dλ为（）。 A: 008°38＇.9W B: 009°21＇.1E C: 008°38＇.9E D: 009°21＇.1W

Activity 2 Watch the video clip and check(√)the topics that are mentioned.1 the definition of an e-book A: Mentioned. B: Not mentioned.

智慧职教: 008、国家创新系统的基本任务是（）

Which of the following statements about image texture is correct: refers to which characteristics of the image? ( ) A: Image texture is the relative brightness of objects in the image B: Image texture is the apparent roughness of an image region C: Image texture is the apparent smoothness of an image region D: Image texture is the frequency of tonal change on an image

1. For an image with 100 * 100 pixels, each pixel has 8-bits to express its gray scale.If the data volume of the compressed image is 40000 bits after Huffman coding , the compression ratio of the image is ( ). A: A. 4:1 B: B. 3:1 C: C. 1:2 D: D. 2:1