As a result, the population of the world is increasing, causing tots of problems. Second, because of the development of industry, tots of the wastes from factories pour into the air and rivers, causing pollution of att kinds. Third, some terrorists are using science and technology against mankind. They use biological, chemical and unclear weapons to threaten world peace...
So its urgent that we find ways to solve these problems. But we should not stop the development of science and technology because of these disasters they bring, just as we should not give up eating for fear of choking. In addition, we should make some rules to regulate our actions. As long as we use science and technology in a proper way, they may bring us even more benefits.
2016春冀教版(三起)五下Lesson 13《Let’s Buy Postcards》ppt课件1
2016春冀教版(三起)五下Lesson 10《The Great Wall》ppt课件1
2016春冀教版(三起)五下Lesson 14《Jenny Writes a Postcards》ppt课件3
2016春冀教版(三起)五下Lesson 13《Let’s Buy Postcards》ppt课件3
冀教版英语五下《Unit 3 Lesson19 Where’s the post office》flash课件
2016春冀教版(三起)五下Lesson 15《Sending the Postcards》ppt课件1
冀教版英语五下《Unit 3 Lesson21 is this york street》flash课件
2016春冀教版(三起)五下Lesson 14《Jenny Writes a Postcards》ppt课件2
2016春冀教版(三起)五下Lesson 11《Shopping in Beijing》ppt课件3
冀教版英语五下《Unit 3 Lesson22 Sending an E-mail》flash课件包
冀教版英语五下《Unit 4 Lesson32 Again please》PPT课件
冀教版英语五下《Unit 2 Lesson16 Unit 1-2单词复习》PPT课件
冀教版英语五下《Unit 3 Lesson23 Are you ready for a quiz》PPT课件
冀教版英语五下《Unit 3 Lesson18 Jenny writes a postcard》PPT课件包
2016春冀教版(三起)五下Lesson 12《A visit to the Great Wall》ppt课件4
冀教版英语五下《Unit 4 Lesson25 Li Ming goes home》flash课件
冀教版英语五下《Unit 3 Lesson22 Sending an E-mail》flash课件2
2016春冀教版(三起)五下Lesson 13《Let’s Buy Postcards》ppt课件4
2016春冀教版(三起)五下Lesson 10《The Great Wall》ppt课件3
冀教版英语五下《Unit 3 Lesson20 At the Post 0ffice》PPT课件
冀教版英语五下《Unit 4 Lesson26 Breakfast》flash课件包
冀教版英语五下《Unit 3 Lesson17 Let’s Buy Postcards》PPT课件
2016春冀教版(三起)五下Lesson 13《Let’s Buy Postcards》ppt课件2
冀教版英语五下《Unit 2 Lesson9 a girl and a prince》flash课件包
2016春冀教版(三起)五下Lesson 12《A visit to the Great Wall》ppt课件2
冀教版英语五下《Unit 3 Lesson23 Are you ready for a song》PPT课件
冀教版英语五下《Unit 4 Lesson25 Li Ming goes home》flash课件2
2016春冀教版(三起)五下Lesson 12《A visit to the Great Wall》ppt课件3
冀教版英语五下《Unit 3 Lesson24 Again Please》PPT课件
2016春冀教版(三起)五下Lesson 10《The Great Wall》ppt课件4