首页
登录
职称英语
[originaltext] (17)Some trees can survive a long time without water. Think
[originaltext] (17)Some trees can survive a long time without water. Think
游客
2023-10-10
72
管理
问题
(17)Some trees can survive a long time without water. Think of trees that grow in the desert. But other trees may need more moisture than they can get from rainfall or from the air. The soil stores moisture during cooler weather. But most of that moisture is gone by the middle or end of the hottest months of the year.(18)Trees and other plants can look thirsty. Leaves hang downward and turn brown or yellow. Here are some suggestions for watering newly planted trees and established trees. With a newly planted tree, the roots have not yet spread out from the root ball. The root ball can become dry faster than the dirt around it. So put water on the area of the football and the surrounding soil until the roots become established.(19)Once a tree is well established, water deeply instead of often. During the hottest season, a deep watering may satisfy a tree for anywhere from ten days to two weeks.(20)One of the effective watering skills is to stop when the soil needs a little time to absorb the water. Otherwise the water runs off the surface and gets wasted.
17. What can we learn about trees in the desert?
18. What’s the symptom when trees look thirsty?
19. How should we water a tree after it has grown up?
20. Why should we stop watering when the soil absorbs the water?
选项
A、Water it often.
B、Water it deeply.
C、Water it every ten days.
D、Water it only in hot season.
答案
B
解析
短文中提到,一旦树木已经稳固.要减少浇水的次数,一次浇足。在最炎热的季节.深浇水可以保证一棵树木十天至两周的需水量。
转载请注明原文地址:http://tihaiku.com/zcyy/3086683.html
相关试题推荐
[originaltext]W:(17)Whichsocialproblemdoyouthinkthegovernmentneedstoc
[originaltext]W:(17)Whichsocialproblemdoyouthinkthegovernmentneedstoc
[originaltext]Workerswhocommutebycar,busortraintotheofficearemo
[originaltext]Youngpeopleareperhapsbetter-knownforspendingmoneythan
[originaltext]Youngpeopleareperhapsbetter-knownforspendingmoneythan
[originaltext]M:Yourfriendisveryargumentative.Ijustcan’tstandthat.W
[originaltext]M:Yourfriendisveryargumentative.Ijustcan’tstandthat.W
[originaltext]W:IhaveamathproblemthatIcan’tfigureout.Couldyoupleas
[originaltext]W:IhaveamathproblemthatIcan’tfigureout.Couldyoupleas
[originaltext]W:IhaveamathproblemthatIcan’tfigureout.Couldyoupleas
随机试题
Areyoualwayssureyouknowwhatpeoplemeanwhentheytrytodescribethei
Whenhesucceededinfinishinghisdesign,thetechnician______(似乎忘乎所以了).seemed
WhattheHeckDoesVincentvanGoghHaveToDoWithInternetMarketing?
FourWaystoBeHappierIftherewereaDr.Happiness,
Hereissomethingmysterious.Everyhumanbeinghasauniquearrangementof
下列有关益元散说法正确的是:A.石膏:甘草=6:1 B.石膏:甘草=3:1
对诊断系统性红斑狼疮最有意义的检查是()。A.总补体溶血活力测定 B.抗
肥胖且单用饮食控制无效的糖尿病患者宜选用A、格列本脲 B、那格列奈 C、苯乙
某现浇钢筋混凝土异形柱框架结构多层住宅楼,安全等级为二级,框架抗震等级为二级。该
治疗窗窄以及代谢存在较大个体差异的药物是()A.茶碱 B.顺铂 C.地高辛
最新回复
(
0
)