problem和difficult的区别详细一点的说明,

problem和difficult的区别详细一点的说明, This problem was very difficult.Lily couldn't ____问选项work it out 和work out it的区别 difficult和difficulty的区别 so difficult 和too difficult 和very difficult 和much too difficult..的区别 problem和question的区别 problem和trouble的区别 deal with the problem和solve the problem的区别 请问difficult和hard的区别谢谢 trouble和difficult的用法区别. 形式宾语和一般宾语从句的区别例句：I thought it ____ for me to work out the problem.A.difficult B is difficult为什么只能选A?是不是it 后加了that就可以选择B? difficult very ill problem student的近义词 difficult ,worried ,a question ,problem的意思 have problem和have problems的区别 have problem和have problems的区别 求question doubt 和problem的区别! question和problem之间的区别是什么? problem ,matter ,question 的区别和用法 issues与problem和question的区别