土壤是指陆地上能够生长植物的疏松表层,土壤之所以能 生长植物,是因为土壤具有肥力,指土壤供给和协调植物 生长发育所需要的水分、养分、空气、热量、扎根条件和无毒害物质 的能力。水、肥、气、热是土壤的四大肥力因素,它们之间相互作用 共同决定着土壤肥力的高低。土壤肥力分为自然肥力人工肥力、有 效肥力和潜在肥力

Lead In 1. Liberal arts 2. Bachelor's Degrees Earned by American Women 3. Distinguished women in Science 4. Chinese Women 5. Topic-related words and Phrases

Lead In 1. Detroit 2. Michigan 3. Hobbs 4. New mexico 5. Topic-related Words and Phrases

1. The olympic games 2. Drug Misuse and Anti-Doping Tests 3. Ben Johnson 4. Adrian annus 5. Health Risks of Doping 6. Tommy Simpson 7. Topic-related Words and Phrases

Auld Lang Syne Should auld acquaintance be forgot and never brought to mind: Should auld acquaintance be forgot and days of auld lang syne? For auld lang syne, my friends, for auld lang syne well take a cup of kindness yet, for auld lang syne. Should auld acquaintance be forgot and never brought to mind Should auld acquaintance be forgot and days of auld lang syne? For auld lang syne, my friends, for auld lang syne We'lt tak'a cup o kindness yet For auld lang syne

Teaching plan for Unit 3 I Aims Demands Get the students (1)to comprehend the text of Section A 2)to have a good grasp of the following points: ups and downs be /get involved with; hold work out: go through; for a time i met with all along; upon/on doing sth subsequently(consequently): harbor; see.as; at one's worst; why do/ not do sth; buy time; never too adj. to do sth

Unit8 Genius sacrificed for failure Teaching objectives 1 Topic: social inequalities 2, Grammar points: sentences with objective complements(adj. noun. V-ed v-ing

Directions: In this section, you will hear ten short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B),) and D), and decide which is the best answer. Then mark the

Part One Listening Comprehension Section A Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said -Both the conversation and the question will be spoken only once. After each question there will be pause. During the pause, you must read the four choices marked A), B),)and D), and decide which is the best answer

Part I Listening Comprehension(20 minutes) Directions: In this section, you will hear ten short conversations. At the end of each conversation, a question will be asked about what was said. both the conversation