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
2024-02-28
8
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] 【S3】
选项
答案
J
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3490010.html
相关试题推荐
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
[originaltext]Beingbilingualproduceschangesintheanatomyofthebrain,
[originaltext]M:Excuseme,doyouhavechangeforaten-dollarnote?Ineedtop
[originaltext]M:Excuseme,doyouhavechangeforaten-dollarnote?Ineedtop
Althoughmuchremainedunaltered,_________(不容否认)thatsomesignificantchanges
[originaltext]W:Everyoneseemstobetalkingaboutclimatechangethesedays!
[originaltext]W:Everyoneseemstobetalkingaboutclimatechangethesedays!
Socialchangeismorelikelytooccurinsocietieswherethereisamixture
Socialchangeismorelikelytooccurinsocietieswherethereisamixture
Socialchangeismorelikelytooccurinsocietieswherethereisamixture
随机试题
Ratesarelow,butconsumerswon’tborrowWithheavydeb
[img]2015m7x/ct_egreqj_egreqjs_0085_20151[/img]Inthefigureabove,if[img]2015
WhatdoestheUSthinkisthenewpostColdWarthreat?[br][originaltext]
Isupposethatheisjustjoking,______?A、don’tIB、isn’theC、isn’titD、isit
Anadvanceddegreeinbusinessstudiesisnowamustforanyambitiousandf
[originaltext]W:We’veallheardthesaying"Laughteristhebestmedicine."How
氨基酸的密码有()。A.1个核苷酸 B.2个核苷酸 C.3个核苷酸 D
有关妊娠妇女针刺时的注意事项,叙述不正确的是A.孕期不可以针刺三阴交、合谷 B
某场地中有一土洞,洞穴顶埋深为12.0m,洞穴高度为3m,土体应力扩散角为25°
对间日疟和三日疟首选药物为A.青蒿素 B.乙胺嘧啶 C.伯氨喹 D.奎宁
最新回复
(
0
)