某船真航向004°，磁差10°E，自差2°W，则罗航向为 。

已知起航点经度λ1＝056º10＇.2W，两地间的经差Dλ＝60º00＇.0E，则到达点经度λ2为： A: 004º49＇.8E B: 004º49＇.8W C: 003º49＇.8E D: 116º10＇.2E

004 括号内的信息 通过码

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.

004 求三个数的和 通过码

一幅地形图的编号为J50C003004，其中“004”表示(　　)。

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

已知起航点经度λ1<br/>=056°10′.2W,两地间的经差Dλ=60°00<br/>′.0E,则到达点经度λ2为______。() A: 004°49<br/>' .8E B: 004°49<br/>' .8W C: 003°49<br/>' .8E D: 116°10<br/>' .2E

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

CRH380A统型动车组二次侧过电流2的故障提示页面为（）。 A: 牵引变流器故障（004) B: 主变压器二次侧过电流（166） C: 牵引变流器故障（005）和牵引变流器故障（141） D: 牵引变流器故障（004）和牵引变流器故障（141）