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
37
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
【S3】
选项
答案
I
解析
转载请注明原文地址:https://kaotiyun.com/show/Ua57777K
0
大学英语四级
相关试题推荐
FlagDay,June14,isthebirthdayofAmericanflag.Onthisdatein1777,theContinentalCongress【C1】______aresolutionstatin
Theyoungdriverlookedovertheenginecarefully____________(以免出问题)ontheway.
Manypeoplehavethesameorasimilardreammanytimes,overeitherashortperiodoftimeortheirlifetime.Recurringdreams
Voluntarylearninginorganizedcoursesbymaturemenandwomeniscalledadulteducation.Sucheducationis【36】tomakepeoplea
A、Herkidswillarrivehomeafterschool.B、Sheistooexhaustedtowork.C、Shehasfinishedherwork.D、Themandoesnotaskhe
Themanagerspokehighlyofsuch______asloyalty,courageandtruthfulnessshownbyhisemployees.
Wearegoingto______ourhomebybuildinganotherroomontoit.
Manybusinesses,suchasdepartmentstores,restaurants,hotelsandairlinecompanies,useacreditsystemforsellingtheirpro
______(我不太想去参加那个音乐会),butIhadtopretendIwanted.
Mostpeoplefeellonelysometimesbutitusuallylastsonlybetweenafewminutesandafewhours.Thiskindoflonelinessisno
随机试题
下列哪几项属于酸中毒的临床表现
在我国,经纪公司所掌握的房源具有()等特征。
A企业年废水排放总量为9000m3,排污系数取0.7,废水处理设施进口COD质量浓度为500mg/L。则A企业COD排放量为()。
诉讼时效中止,必须符合法定条件。在诉讼时效期间的最后()个月内,因不可抗力或者其他障碍不能行使请求权的,诉讼时效中止。
下列关于商业银行风险管理的组织架构,说法正确的有()。
农民专业合作社成员享有的权利包括()。
最早提出圆周率的正确计算方法的数学家是()。
许多人喜欢晨练。但从环境角度来看,城市早晨的空气并不新鲜,原因是()。
根据2018年宪法修正案,爱国统一战线中新增加的阶层是:
AfterreadingthefollowingintroductiontothecauseonFirstCertificateinEnglish,youarerequiredtocompletetheoutline
最新回复
(
0
)