沥青质的X射线衍射谱图在2θ≈26°处有（002）峰存在。

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.

已知有理数t满足|1一t|=1+|t|，则|t一2006|—|1一t|=( )． A: 2 000 B: 2 001 C: 2 002 D: 2 005 E: 2 006

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

将学生张三从编号为001的系转到编号为002的系，应使用的SQL语句（ ）。 A: Updata 学生Set 系编号= ‘002’ B: Update 学生 set 系编号=’002’ Where 姓名=’张三’ and 系编号=’001’ C: Update 学生 set 系编号=’002’ Where 姓名=’张三’ D: Update 学生 系编号=’002’ Where系编号=’001'

002 字符三角形 通过码

‎002 字符三角形 通过码‎

002 5 2 2[br][/br]用于侧向接发旅客列车的单开道岔不得小于( )号。 A: 9 B: 12 C: 18 D: 30

沥青质的X射线衍射谱图在2θ≈26°处有（002）峰存在。 A: 对 B: 错