x=2^-011×0.100101，y=2^-010×(-0.011110)

二进制数010表示十进制数（） A: 4 B: 2 C: 5

下面代码的运行结果是：for i in range（2）:print（i, end=”）else:print（0）（） A: 010 B: 0120 C: 012 D: 010 E: 0120

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.

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

Which of the following is not a description of image texture? （ ） A: the frequency of tonal change on an image B: the apparent roughness of an image region C: the apparent smoothness of an image region D: relative brightness of objects in the image

Watch the video clip and answer the questions1. According to the video clip, which city is the greenest one in Asia?2. According to the video clip, what makes Copenhagen the top one eco-friendly city in the world?

可以分别调节素材或轨道的音量，应选择（） A: AShow Clip＞Touch Write B: BShow Clip＞Latch C: CShow Clip＞Touch Vloume D: DLatch＞Touch＞Write

明亮阴暗第一次010第二次19第三次28第四次010第五次28