首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
We often think of agriculture as planting seeds and harvesting crops. But many crops do not come from seeds. Many kinds of trees
We often think of agriculture as planting seeds and harvesting crops. But many crops do not come from seeds. Many kinds of trees
admin
2012-09-19
62
问题
We often think of agriculture as planting seeds and harvesting crops. But many crops do not come from seeds. Many kinds of trees and plants are grown from【S1】______cut from existing trees and plants. This is called grafting(嫁接) .
Farmers cut branches or young growths, called【S2】______, from one plant and place them on a related kind of plant. The branch or bud that is grafted is called a scion(接穗) . The plant that【S3】______the graft is called the root stock. Over time, the【S4】______from the two plants grow together, the grafted plant begins to【S5】______the leaves and fruit of the scion, not the root stock.
A graft can be cut in several ways. A cleft graft(割接,劈接) , for example, requires a scion with several buds on it. The bottom of the scion is cut in the【S6】______of the letter V. A place is cut in the root stock to accept the scion. The scion is then【S7】______placed into the cut on the root stock. Growth medium is put on the【S8】______to keep it wet and help the growth.
Grafting can join scions with【S9】______qualities to root stock that is strong and resists disease and insects. Some common fruit trees such as sweet cherries have to be grafted.
In an age of hightechnology agriculture, grafting is a lowtechnology method that remains【S10】______important.
A blossoms B pieces C composes D parts
E securely F extremely G buds H agreeable
I accepts J firmly K grow L desirable M produce N shape O join
【S6】
选项
答案
N
解析
转载请注明原文地址:https://kaotiyun.com/show/La57777K
0
大学英语四级
相关试题推荐
FlagDay,June14,isthebirthdayofAmericanflag.Onthisdatein1777,theContinentalCongress【C1】______aresolutionstatin
RobSapp,27,fromKent,lovedgameswhenhewasattendingschool.Infact,helovedgamessomuchthathedecidedtobecomeaP
A、Watchingtraditionalplays.B、Visitingthemagnificentlibraries.C、Boatingontheriver.D、Cyclinginnarrowstreets.C本题询问旅游
A、Customerandassistant.B、Fatheranddaughter.C、Dentistandpatient.D、Teacherandstudent.C题目询问对话人之间的关系是什么。关键词为teeh和examini
Manypeoplewronglybelievethatwhenpeoplereacholdage,theirfamiliesplacetheminnursinghomes.Theyareleftinthehan
Ourplanwillbecarriedoutsuccessfully______.(只要这些问题得到适当地解决)
A、Moststudentswouldliketoworkforanewspaper.B、Moststudentsfindajobbyreadingadvertisements.C、Moststudentsfindi
A、Justgetthetreatmentfromthefirstdoctor.B、Takeadifferentkindofmedicine.C、Askanotherdoctorforadvice.D、Togett
Bambooreproducesintwoways.Itflowersandproducesseeds.Italsoproducesnewgrowthfromitsroots.Bambooplantsgrowing
Hehadhadalonganduncomfortabletrip,forhehadbeenconfined______thewoodenboxforovertenhours.
随机试题
最满意的控制方式应该是,在企业经营活动中,偏差在产生之前就被发现,管理者可以预先采取必要的措施力求避免偏差的产生,这种纠偏方法的现实可能性很高。()
食管癌早期症状最常见的是
可减弱香豆素类药抗凝血作用的药是
患儿女,2岁,肠套叠20h,目前的处理措施最主要是()
基金管理公司治理结构通常应当符合的要求有()。
下列各项中,不属于免征增值税的是()。
2007年12月31日,乙公司预计某生产线在未来4年内每年产生的现金流量净额分别为200万元、300万元、400万元、600万元,2012年产生的现金流量净额以及该生产线使用寿命结束时处置形成的现金流量净额合计为800万元;假定按照5%的折现率和相应期间的
《中华人民共和国合同法》的基本原则主要包括()原则。
9
ReadingFasterTheonlywaytoreadfasteristoreadfaster,anditisaserioussuggestion.【T1】________onspeedreadi
最新回复
(
0
)