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
46
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
Wheredothespeakersprobablywork?[br][originaltext]W:Sanjiv,lneedyout
Somepioneeringworkthatbeganasanattempttodiscoverwaystoincreasep
WorldWaterShortageAnews
______afewscratches,thecarwasundamaged.A、InadditiontoB、InfactC、With
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustinc
()中国远洋运输公司()付款方式[br]()还盘(价)()即期汇票M,C
个体健康危险因素评价结果为:评价年龄高于实际年龄,说明A.被评价者所存在危险因素
2009年2月,某歌星参加文艺演出获得收入20000元,拍广告获得收入40000
覆冰天气时,观察外绝缘的覆冰厚度及冰凌桥接程度,覆冰厚度不超(____),冰凌
男性.27岁,3天前搬重物后感腰痛,伴右下肢放射痛,咳嗽、喷嚏时症状加重,不能下
最新回复
(
0
)