高中英语必修4 uint2 reading chemical or organicfarming.pptVIP

Expressions 1.化肥 2.对…造成损害 3.洗掉某物 4.导致;造成(后果);通往 5.逐渐增强,建立 6.另外(还有) 7.使…免受(影响); 使…不含(有害物) 8.集中(注意力、精力)于 9.每隔几年 10.避免做… chemical fertilizers cause/do damage to wash off lead to bulid up in addition (to) keep…free from/of focus on every few years avoid doing 1.supply. 1) 用作名词时： a) 指“供给;供应”等,其反义词为demand (需求)。 supply and demand 供与求 be in short supply 供应缺乏,供应不足 food supply 食物供应 water supply 供水 b) 当“供应品;生活用品;补给品”等,常用复数supplies。 military supplies 军需品 household supplies 家庭用品 medical supplies 医用品 2) 用作动词时,指“供给,提供,备办”等, supply sb. (with) sth , supply sth. to /for sb. -- They supplied food to/for them. 他们供给他食物。 -- The library is well supplied with books. 图书馆备有充足的书籍。 [即学即练] 用lead to的适当形式完成句子。 1. Students should always remember that hard work is the main way which ______ success. 2. The bad weather _____ a terrible accident a few days ago. led to leads to 2.lead to 3. focus用法 [猜一猜] 根据语境推断focus在下列句子中的含义, 并从a-d中找出与每句话中的focus相符合的英文释义。 1. The focus of the meeting changed from population growth to the education of women. 2. Bring the object into focus if you want a clear photograph. 3. She tried to focus her mind on her work. 4. She turned the camera and focused on Martin’s face. a. the thing, person, situation, etc. that people pay special attention to b. a point or distance at which the outline of an object is clearly seen by the eye or through a lens c. to point a camera at something, and change the controls slightly so that you can see that thing clearly d. to give special attention to one particular person or thing, or to make people do this c a b d [归纳总结] focus作名词, 意为“焦点、中心点”; 作动词, 意为“集中、聚焦”, 常构成短语focus on, 意为“集中(注意力、精力等)于”。 1. Crops such as peas or soybeans put important minerals back into the soil, making it ready for crops such as wheat or corn that need rich and fertile soil. [分析] ①本句结构比较复杂。其主干结构为: 主句(Crops put important minerals back into the soil) + 状语(making i