some students often ask their friends for help when they have d___其他解答

some students often ask their friends for help when they have d___.

人气：191 ℃　时间：2019-08-20 08:29:32

解答

很高兴能够在这里回答你的问题,这道题的正确答案应该为：
difficulty　困难
当学生有困难时,他们常求助于他们的朋友