首页
登录
职称英语
Only special plants can survive the terrible climate of a desert, for these a
Only special plants can survive the terrible climate of a desert, for these a
游客
2023-07-30
19
管理
问题
Only special plants can survive the terrible climate of a desert, for these are regions where the annual range of the soil temperature can be over 75℃. Furthermore, during the summer there are few clouds in the sky to protect plants from the sun’s ray. Another problem is the fact that there are frequently strong winds which drive small sharp particles of sand into the plants, tearing and damaging them. The most difficult problem for all forms of plant life, however, is the fact that the entire annual rainfall occurs during a few days or weeks in spring.
Grasses and flowers in desert survive from one year to the next by existing through the long, hot, dry season in the form of seeds. These seeds remain inactive unless the right mount of rain falls, If no rain falls, or if insufficient rain falls, they wait until the next year. or even still the next. Another factor that helps these plants to survive is the fact that their life cycles are short. By the time that the water from the spring rains disappears--just a few weeks after it fall--such plants no longer need ally.
The perennials(多年生植物) have special features which enable them to survive as plants for several years. Thus, nearly all desert perennials have extensive root systems below ground and a small shoot system above ground. The large root network enables the plant to absorb as much water as possible in a short time. The small shoot system, on the other hand, considerably limits water loss by evaporation(蒸发).
Another feature of many desert perennials is that after the rainy season they lose their leaves in preparation for the long, dry season, just as trees in wetter climates lose theirs in preparation for the winter. This reduces their water loss by evaporation during the dry season. Then, in the next rainy season, they come fully alive once more, and grow new branches, leaves and flowers, just as the grasses and flowers in desert do. [br] Ordinary plants cannot survive the desert weather as a result of the following EXCEPT for ______.
选项
A、the strong winds
B、the strong sun’s ray
C、the long summer days
D、the high soil temperature
答案
C
解析
细节题。本题考查列举处。第一段前三句分别列举了影响植物在沙漠生长的三个因素:soil temperature(选项D),sun’s rays(选项B),strong winds(选项A),只有选项C未提及。
转载请注明原文地址:https://tihaiku.com/zcyy/2881969.html
相关试题推荐
[originaltext]W:Everyoneseemstobetalkingaboutclimatechangethesedays!
[originaltext]Tomostforeigners,especiallythosefromtheeasternworld,su
[originaltext]Tomostforeigners,especiallythosefromtheeasternworld,su
Climate,morethananyothersinglefactor:determinesthedistributionsof
Whentalkingtosomescientists,especiallyyoungones
E1Ninoisadisturbanceoftheworld’snormalclimatepattern.DuringElNin
E1Ninoisadisturbanceoftheworld’snormalclimatepattern.DuringElNin
E1Ninoisadisturbanceoftheworld’snormalclimatepattern.DuringElNin
TypesofClimateClimateisthecombinationoftemp
TypesofClimateClimateisthecombinationoftemp
随机试题
Howmanypeoplehavebeenestimatedtobedeadintheconflict?[originaltext]
[originaltext]W:Well,Ithoughtyouwereworkingforalargebusinessmachineco
为了消除电弧接地过电压,最根本的途径是消除间歇性电弧。()
某女,53岁,右上齿痛半年,隐隐作痛,时作时止,脉沉。针灸治疗在合谷、颊车、下关
根据《关于促进互联网金融健康发展的指导意见》,互联网金融业务的客户资金应实行第三
A.风邪 B.寒邪 C.湿邪 D.燥邪 E.火邪具有轻扬开泄致病特点的邪
某装载着甲、乙、丙、丁四人货物的货轮在航行过程中遭遇风暴,货轮受损。该货轮驶人某
预测今后几年房地产供求是供大于求还是供不应求是属于()。A:定性预测 B:定量
进行设备现场监造与检验工作时,咨询工程师应()A:在设备制造开始前组织召开协调会
钢材是以铁为主要元素,其含碳量一般为( )。A.0.01%~0.02% B.
最新回复
(
0
)