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
57
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] 【S10】
选项
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2873757.html
相关试题推荐
Socialchangeismorelikelytooccurinsocietieswherethereisamixture
Socialchangeismorelikelytooccurinsocietieswherethereisamixture
[originaltext]TherearemanyreasonswhyfamilylifeinBritainhaschanged
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Inthepastfiftyyears,Americansocietyhaschangedagreatdeal.Fiftyye
Forthispart,youareallowed30minutestowriteacompositionentitledChange
[originaltext]M:Ihavebeenstudyingtoomuchandneedachange.SoIamjust
随机试题
WhileAmericanrappershavebeenpopularinChinasincethe1990s,homegrownrap
Collisionbetweenanaircraftandoneormorebirdsistermedabird-strike.
糖尿病急性并发症是A.对称性肢体疼痛 B.白内障 C.下肢坏疽 D.皮肤化
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
影响企业人力资源供给的主要渠道有()。A:复员转业军人 B:流动人员 C:其
农业正在向着多元化的方向发展,如今思考农产品的生产,就要一定程度上跳脱“非涨即跌
某商户进了一批货,按照50%的利润定价,结果卖出了40%。此时,该商户发现该商品
关于伪造、出售伪造的增值税专用发票罪,下列哪一说法是错误的?()A.本罪是单位
按照公道的表现形式,公道可以分为( )。A.公道的行为 B.公道的制度
下列关于企业愿景、使命与战略目标的表述,正确的有()。A.企业愿景包括核心信仰
最新回复
(
0
)