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《Reading and vocabulary》公开课PPT课件优质课下载
Why?
Group discussion
Background Information
hybrid rice
Yuan Longping
crop breeding
the activity of keeping crops in order to produce new or better crops
Context: We eat rice almost every day. Rice is our staple food.
So a staple food is one you eat ________.
rarely
regularly
staple food
rice
wheat
2011
2012
2000
3000
yield
(kg)
year
Context:
We produced 3000 kilograms of rice this year. Last year, the number was 2000. The yield this year is higher than that of last year.
So yield means ________.
(a) quantity (eg. of food)