请把birdnest.jpg彩色图片，转换为黑白图片，并保存为pic1.png，请正确的程序段： A: from PIL import Image im = Image.open('birdnest.jpg') om = im.convert("RGB") om.save('"pic1.png"') B: from PIL import Image im = Image.open('birdnest.jpg') om = im.convert("L") om.save('"pic1.png"') C: from PIL import Image im = Image.open('birdnest.jpg') om =im.convert("CMYK") om.save('"pic1.png"') D: from PIL import Image im = Image.open('birdnest.jpg') om = Image.convert("L") om.save('"pic1.png"')

4-3。What is the working principle for LED？（ ） A: convert electric to light B: convert light to electric C: convert electric to heat

The execution element convert the ____ to ____.

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

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

How to convert logical syllogism into written argument ?

执行以下d代码以后 输入15 3回车 则输出结果为   def convert n k     if n 0         return convert n k k str n k     else         return a b eval input print convert a b

The ______cell can convert the energy of sunlight into electric energy.

Convert Selection to Faces对应的中文是____

GHOST软件可以将整个硬盘所有内容进行备份,方法是________。 A: Partition To Image B: Disk To Image C: Partition From Image D: Disk From Image