《2025年南方新课堂金牌学案九年级英语全一册人教版》

请仔细阅读所给的材料,口头说说中国古代几项伟大发明的相关情况。内容包括：
1. 纸(when,who,how,why)。
2. 火药(when,who,how,why)。
3. 另外一项比较著名的中国古代发明(when,who,how,why)。

答案： 口头表达
(one possible version)
There are many great inventions in ancient China, such as paper, gunpowder and kites. The first version of paper was created in the Xi Han Dynasty but it wasn't widely used because it was too hard to write on. So Cai Lun improved the method of making it. He made paper from bark, hemp, cloth and fishing net and it could easily be written on. The gunpowder was first invented in the Five Dynasties and Ten Kingdoms period to make explosives used by the military. As for the first kite, it was said that it was invented by Lu Ban in the fifth century B. C. and it was once used as signals during wars.

假如你是李华,酷爱发明。你报名参加了国际中学生发明创业大赛,需要向评委们“推销”你的新发明,以下是发明的基本信息。请用英语写一篇短文,为你的发言做准备。

Ladies and Gentlemen,
My name is Li Hua. It's my great honor to introduce my new invention to you. It is a water purifier. It was invented two months ago. It is used for making water clean. It was made in the shape of a bottle cap. It uses UV light to clean water. When you want to drink clean water, you can put it on your bottle and then turn it on. The water will be cleaned in 30 seconds. It's convenient to carry in the wild. You must want to know how much it is. It's 50 yuan. Do you want clean water when you are camping in the wild? If the answer is yes, then the water purifier is perfect for you. Aren't you thinking of buying one?
Thank you.

答案： It is a water purifier. It was invented two months ago. It is used for making water clean. It was made in the shape of a bottle cap. It uses UV light to clean water. When you want to drink clean water, you can put it on your bottle and then turn it on. The water will be cleaned in 30 seconds. It's convenient to carry in the wild.
You must want to know how much it is. It's 50 yuan.
Do you want clean water when you are camping in the wild? If the answer is yes, then the water purifier is perfect for you. Aren't you thinking of buying one?