Unit 9 when was it invented ?
Section A
一： 1. invented 2.invention 3.adjustable 4.heat 5.slippers 二： 1~5 CBCCC
三： 1. What, used for 2. Who , invented 3. is , cleaned 4.must be repaired 5. to see
Section B
一： 1.notice 2. salty 3.produced 4. remain 5.pleasant
二: 2.too thin 2.by accident 3.According to, was discovered 4. by mistake 5.in this way ,in the end 6.fell into
三: 1~5:AADCD 6~10:BDBDC 11~12 :AC
四: for, on, Who , think, are, inwentions, is , most
Self Check and Reading
一: 1.century 2.knock 3.below 4.wooden 5.towards 6. developing 7.divided 8.active 9.aim 10.create
二: 1.helpful 2.invention 3.salt 4.the most popular 5.safety 6.wood
三: 1.It is believed 2.named 3. to learn 4.was sent 5.was handed in 6.Was ,cleaned 7.found him 8.When was, invented
四: 1~5:BADBA 6~10:CADAB
五: 1~5:ABCAC
6.He grew vegetables in his garden and sold them.With the money he set up a chemical lab.
7.Yes.Because he was awarded 1368 separate and distinct patents during his lifetime.
8.February 11th,1847 9.October 18th ,1931 10.America 11.Built a lab 12. 1368
13. His first patented invention was an electrical vote recorder in 1868.
14. 1876~1877,invented the phonograph.