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
26
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] 【S2】
选项
答案
H
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2873749.html
相关试题推荐
Forthispart,youareallowed30minutestowriteacompositionentitledChange
[originaltext]M:Ihavebeenstudyingtoomuchandneedachange.SoIamjust
Asamediumofexchangemoneypermitstheseparationofexchangeintothetw
Asamediumofexchangemoneypermitstheseparationofexchangeintothetw
Therearetwofactorsthatdetermineanindividual’sintelligence.Thefirst
Therearetwofactorsthatdetermineanindividual’sintelligence.Thefirst
Therearetwofactorsthatdetermineanindividual’sintelligence.Thefirst
Therearetwofactorsthatdetermineanindividual’sintelligence.Thefirst
Therearetwofactorsthatdetermineanindividual’sintelligence.Thefirst
Therearetwofactorsthatdetermineanindividual’sintelligence.Thefirst
随机试题
Dr.FaustusisaplaybasedontheGermanlegendofamagicianaspiringfor____
Completethesummarybelow.WriteNOMORETHANTHREEWORDSforeachanswer.Majo
在民用项目住宅小区规划中,下列是影响工程造价的主要因素的是()A.单元组成
贝壳、甲壳、化石等类药物入汤剂的用法是()A.先煎 B.后下 C.布包
将质量体系文件分为四个层次,下列说法正确的是A.质量记录包括检测细则、操作规程
患者,女,71岁,陈旧性广泛前壁心肌梗死,近半年来病人明显感觉体力活动受限,洗脸
根据以下材料,完成问题。 2005年我国全社会固定资产投资88604亿元
E航空公司改变了传统模式,取消了机票和登机卡,从而节省了在机票印刷、生产、邮寄方
员工为公司提供修理劳务,应交增值税()。
某单原子分子理想气体进行卡诺循环时,高温热源温度为227°C,低温热源温度为12
最新回复
(
0
)