Ⅰ. difficult “困难”多指智力上的困难。一般可与hard代换。但比它程度要大。如：
① The question is difficult to answer.
Ⅱ. hard “困难”多指体力上的困难。如：
①Some of the apples are hard to reach.
2016春鲁教版英语八下Unit 2《It’s a nice day, isn’t it》ppt课件6
鲁教版英语八下《Unit 7 I’ll help clean up the city parks》ppt课件（3）
鲁教版英语八下《Unit 8 Have you packed yet》ppt课件（4）
鲁教版英语八下《Unit 7 I’ll help clean up the city parks》ppt课件（5）
2016春鲁教版英语八下Unit 1《When was he born》ppt课件3
鲁教版英语八上《Unit 7 Would you mind turning down the music》ppt课件之一
鲁教版英语八下《Unit 8 Have you packed yet》ppt课件（3）
鲁教版英语八下《Unit 7 I’ll help clean up the city parks》ppt课件（2）
2016春鲁教版英语八下Unit 1《When was he born》ppt课件4
2016春鲁教版英语八下Unit 5《I think that mooncakes are delicious》ppt课件1
2016春鲁教版英语八下Unit 2《It’s a nice day, isn’t it》ppt课件5
2016春鲁教版英语八下Unit 2《It’s a nice day, isn’t it》ppt课件4
2016春鲁教版英语八下Unit 2《It’s a nice day, isn’t it》ppt课件8
鲁教版英语八上《Unit 7 Would you mind turning down the music》ppt课件之三
鲁教版英语八上《Unit 7 Would you mind turning down the music》ppt课件
鲁教版英语八上《Unit 6 How long have you been collecting shells》ppt课件之三
2016春鲁教版英语八下Unit 2《It’s a nice day, isn’t it》ppt课件7
2016春鲁教版英语八下Unit 1《When was he born》ppt课件1
鲁教版英语八下《Unit 6 Where would you like to visit》ppt课件（2）
2016春鲁教版英语八下Unit 5《I think that mooncakes are delicious》ppt课件2
2016春鲁教版英语八下Unit 2《It’s a nice day, isn’t it》ppt课件1
2016春鲁教版英语八下Unit 1《When was he born》ppt课件2
鲁教版英语八下《Unit 5 I like music that I can dance to》ppt课件（2）
2016春鲁教版英语八下Unit 4《How can we become good learners》ppt课件2
2016春鲁教版英语八下Unit 5《I think that mooncakes are delicious》ppt课件4
2016春鲁教版英语八下Unit 3《Where would you like to visit》ppt课件2
2016春鲁教版英语八下Unit 2《It’s a nice day, isn’t it》ppt课件2
2016春鲁教版英语八下Unit 3《Where would you like to visit》ppt复习课件
鲁教版英语八上《Unit 6 How long have you been collecting shells》ppt课件之一
鲁教版英语八上《Unit 5 If you go to the party,you’ll have a great time》ppt课件之一