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
Plants in Desert Only special plants can survive the terrible climate of a desert, for these are regions where the annual ra
Plants in Desert Only special plants can survive the terrible climate of a desert, for these are regions where the annual ra
admin
2014-05-13
24
问题
Plants in Desert
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 °C . 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 that 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 amount 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 the water from the spring rains disappears—just a few weeks after it falls—such plants no longer need any.
The perennials(多年生植物)have special features that 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 short time. The small shoot system, on the other hand, considerably limits water loss by evaporation(蒸发).
Another feature of many 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 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.
Grasses and flowers in desert are able to survive because they stay in the form of seeds to wait for the right amount of water to come.
选项
A、Right
B、Wrong
C、Not mentioned
答案
A
解析
根据线索词“Grasses and flowers”和“seeds”,可以很快把第二段第一句确定为答案相关句。这个句子的大意是:沙漠里的花草年复一年以种子的形式度过漫长、炎热,而又干燥的季节。可见题干的说法与原文的说法一致,所以选择A项。
转载请注明原文地址:https://jikaoti.com/ti/ws6sFFFM
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
TeachingandLearningMedicineAwardTwoscientistswhohavewonpraiseforresearchintothegrowthofcancercellscouldb
TeachingandLearningMedicineAwardTwoscientistswhohavewonpraiseforresearchintothegrowthofcancercellscouldb
LungCancer1Thedeathrateduetocancerofthelungshasincreasedmorethan800percentinmalesandhasmorethandoubl
AdaptationofLivingThingsCertainanimalsandplantsdevelopcharacteristicsthathelpthemcopewiththeirenvironmentbe
AboutonemillionAmericansarediagnosedannuallywithskincancer.
ChestCompressions:MostImportantofCPRCardiopulmonaryresuscitation,orCPR,cansavethelifeofsomeonewhoseheartha
NaturalMedicinesSinceearliestdays,humanshaveusedsomekindsofmedicines.Weknowthisbecausehumanshavesurvived.
AdaptationofLivingThingsCertainanimalsandplantsdevelopcharacteristicsthathelpthemcopewiththeirenvironmentbe
FactsaboutStroke1Every45seconds,someoneinAmericahasastroke.Every3.1minutes,someonediesofone.Strokekilled
Ayoungmanisbeinghailedaherotonightafterrescuingtwochildren.
随机试题
常用金属材料有黑色铸铁和有色金属。()
骨盆底形态学特征正确的是
确诊禽流感的方法为
在采购材料过程中支付的各项采购费用,均应记人“管理费用”账户。()
证监会对甲上市公司高管采取市场禁入措施,则该高管在禁入期不得担任以下职务()。Ⅰ.甲上市公司的财务总监Ⅱ.为上市公司出具审计报告的注册会计师Ⅲ.投行人员Ⅳ.非上市股份公司的财务总监
根据行为金融学理论,投资者所具有的避免“后悔”心理特征会导致()。
行政复议当事人的权利有()。
()是指最先的印象对人的知觉所产生的强烈影响。(2007年11月三级真题)
为了提高公民(身体)素质.开辟了一条20公里的徒步路线,取得了很好的反响,领导决定再加开五条。让你负责路线的选取工作.如何开展?
设则y’=_____.
最新回复
(
0
)