首页
登录
职称英语
Many trees and shrubs change color in fall. Three factors influence fall’s c
Many trees and shrubs change color in fall. Three factors influence fall’s c
游客
2023-07-27
68
管理
问题
Many trees and shrubs change color in fall. Three factors influence fall’s colorful farewell-leaf pigments (色素), length of night, and weather. The timing of the color change is mainly【S1】______by the increasing length of night. None of the other【S2】______influences, such as temperature, rainfall, food supply, are as unchanging as the【S3】______increasing length of night during fall. As days grow shorter, and nights grow longer and cooler, biochemical processes in leaves begin to【S4】______the landscape with an explosion of colors. And nature puts on one of its most wonderful displays of beauty.
The timing of the color change varies by【S5】______. Some species in southern forests can become vividly colorful in late summer while all other species are still vigorously green. Oaks put on their colors long after other species have already【S6】______their leaves. These differences in timing among species seem to be【S7】______inherited, for a particular species, whether on a high mountain, or in warmer lowlands, will change color at the same time.
However, some species are【S8】______. Pines, for example, are green all the year round because they have toughened up. They have developed over the years a needle-like leaf, which is【S9】______with a heavy wax (蜡状的) coating. And the liquid inside their cells contains cold-resistant elements. So the leaves of evergreen can safely withstand all but the most【S10】______winter conditions, such as those in the Arctic.
A) severe E) species I) shed M) covered
B) paint F) regulated J) steadily N) attractive
C) genetically G) enthusiastic K) evergreens O) faded
D) present H) environmental L) present [br] 【S8】
选项
答案
K
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2873755.html
相关试题推荐
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Forthispart,youareallowed30minutestowriteacompositionentitledChange
[originaltext]M:Ihavebeenstudyingtoomuchandneedachange.SoIamjust
[originaltext]M:Ihavebeenstudyingtoomuchandneedachange.SoIamjust
Asamediumofexchangemoneypermitstheseparationofexchangeintothetw
Therearetwofactorsthatdetermineanindividual’sintelligence.Thefirst
随机试题
NowwetraveltothenorthcentralpartoftheUnitedStates.Weareinthe
Mr.Bascombwasupset.Attimeslikethishewishedhehadneverbecomeacand
Inthepast,degreeswereveryunusualinmyfamily.Today,fiveofmybrot
《兄妹开荒》是延安文艺座谈会召开以后出现的()A.话剧 B.歌剧 C.秧歌
商业银行在使用内部评级法初级法计量信用风险资本时,()不属于合格信用风险缓释
糖尿病患者的饮食治疗要求中,下列哪项正确()A.限制糖类进食量 B.蛋
患者少腹部刺痛,经行疼痛加重,经血量多有块,瘀块排出则痛减,带下量多,婚久不孕,
残根的拔除或保留应根据()A.牙根缺损破坏的范围 B.根尖周组织的健康情况
()是用来分析企业资产的分布情况和周转使用情况,估量企业对资产的利用效率。A.
甲公司向乙公司销售一批商品,开出的增值税专用发票上注明的价款为10000元,
最新回复
(
0
)