导航 4.From paragraph 4,we know that A.organic farmers always change the kind of crop grown in each field every year B.vegetables grow on the ground's surface C.beans should be grown together with corn and wheat D.vegetables that put down deep roots are harmful to the soil
导航 4.From paragraph 4,we know that A . A.organic farmers always change the kind of crop grown in each field every year B.vegetables grow on the ground’s surface C.beans should be grown together with corn and wheat D.vegetables that put down deep roots are harmful to the soil
导航、 5.How many ways do the organic farmers have to keep their soil fertile and healthy? A.2. B.3. C.4. D.5
导航 5.How many ways do the organic farmers have to keep their soil fertile and healthy? B A.2. B.3. C.4. D.5
导航 6.Why can't we stop the use of man-made chemicals in agriculture entirely? A.Organic farming cost us a lot of money. B.Organic farming can meet people's need. C.Chemical farming brought us huge profit. D.Chemical farming helps serve the need for food
导航 6.Why can’t we stop the use of man-made chemicals in agriculture entirely? D A.Organic farming cost us a lot of money. B.Organic farming can meet people’s need. C.Chemical farming brought us huge profit. D.Chemical farming helps serve the need for food
导航 课堂·重难突破 词汇精讲 1.【教材原文】They may look beautiful on the outside,but inside there is usually more water than essential minerals,and they often have less flavour as well.(page 55) 此类作物外表靓丽，而内里却经常是水分多于必需矿物质， 并且往往口感较差
导航 词 汇 精 讲 1.【教材原文】They may look beautiful on the outside,but inside there is usually more water than essential minerals,and they often have less flavour as well.(page 55) 此类作物外表靓丽,而内里却经常是水分多于必需矿物质, 并且往往口感较差。 课堂·重难突破
导航、 考点essential ad.完全必要的；极其重要的 be essential to/for对...很重要 It is essential that...(should)do..做...是完全必要的。 It is essential for sb to do..对某人来说做..…是完全必要的
导航 考点essential adj.完全必要的;极其重要的 be essential to/for 对……很重要 It is essential that...(should) do... 做……是完全必要的。 It is essential for sb to do... 对某人来说做……是完全必要的