—Li, your homework isn’t_________. What’s wrong?
—I’m sorry,Mr. Wu. I have tried my best, but I don’t have _________.
三角形两边的长分别为2和5,第三边的长是方程的根,则该三角形的周长为
有大小两种货车,2辆大货车与3辆小货车一次可以运货15.5t,5辆大货车与6辆小货车一次可以运货35t,则3辆大货车与2辆小货车一次可以运货__t
Amanda read the article_______,and found something important in it.
正八边形一个内角的度数为.