单词：silkworm room
单词：silkworm room 相关文章
Fifteen hundred years ago in China, silk production was a state secret. The silk trade was so valuable that anyone who tried to take silkworm eggs or mulberry seeds out of China was put to death. Then in 552 AD, two monks smuggled silkworm eggs to Co
初学者听力文摘精选
Survival Of The Sluggish Silkworms have been bred over thousands of years to behave quite unlike their caterpillar cousins in the wild. Thats because people purposely breed silkworms to fit this job description: WANTEDSuperlative silk producers. Bene
英语听力文摘 English Digest
Secrets Of Silk Production Fifteen hundred years ago in China, silk production was a state secret. The silk trade was so valuable that anyone who tried to take silkworm eggs or mulberry seeds out of China was put to death. Then in 552 AD, two monks s
英语听力文摘 English Digest
1500年以前，丝绸的生产是中国的国家机密 Fifteen hundred years ago in China, silk production was a state secret. The silk trade was so valuable that anyone who tried to take silkworm eggs or mulberry seeds out of China was put to death
英语听力文摘 English Digest
Key Sentences（重点句子） 1．I'd like to book a double room for Tuesday next week． 下周二我想订一个双人房间。 2．What's the price difference？ 两种房间的价格有什么不同？ 3．A double room with a front view is 140
实用英语
Silkworm s and Skin Graft s Don: One of the neater things thats going on in biology is the genetic modification of species. By changing the instructions in their genes, we can make certain plants and animals produce things that are useful to humans.
英语听力文摘 English Digest