首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Many trees and shrubs change color in fall. Three factors influence fall’s colorful farewell-leaf pigments (色素), length of night
Many trees and shrubs change color in fall. Three factors influence fall’s colorful farewell-leaf pigments (色素), length of night
admin
2010-05-26
45
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
【S8】
选项
答案
K
解析
转载请注明原文地址:https://kaotiyun.com/show/0sV7777K
0
大学英语四级
相关试题推荐
A、Equivalenttoahydrogenbomb.B、EquivalenttotonsofTNT.C、Equivalenttotonsofhydrogenbombs.D、EquivalenttoatonofT
A、Heprefersthesmallereveningclasses.B、Hehassignedupforadaycourse.C、Hehastoworkduringtheday.D、Hefindsthee
Intheearlydaysoftheinternet,manypeopleworriedthataspeopleintherichworldembracednewcomputingandcommunication
A、Thefarmerstherehavebroughtitundercontrol.B、Thefactoriestherehavefoundagooduseforit.C、Theclimatethereisun
______(如果他下午来),Ishouldaskhimtohelpus.
WhowontheWorldCup1994footballgame?WhathappenedattheUnitedNations?Howdidthecriticslikethenewplay?【C1】______a
______(直到失去健康)thatpeopleknowthevalueofhealth.
FromthetopofTempleIV,densejunglecanopy(遮篷)spreadstothehorizonineverydirection.Some215feetbelowliesTikal,th
A、Throwhimselfinfrontofthetrain.B、Throwhimselfagainstthebus.C、Squeezehimselfbetweentherails.D、Strikehimselfwi
A、It’scruel.B、It’sinteresting.C、Sheobjectstokillinganimalsforsport.D、Theyarefullofskills.D当男士说:“Theyarenotrea
随机试题
下列关于职业性肿瘤特点的描述,哪项是错误的
下列哪项诊断检查易致泌尿系统感染
男性,60岁,进行性吞咽困难3月,体重下降5斤,查体无阳性所见,首选检查是
不做初期缝合的创口是
A.距根尖端1.5mm,根尖部根管内无任何X线透射影像B.在距根尖端5mm处从近中侧穿.根尖部根管内无根充物C.齐根尖端,根尖部近根管壁处有线状X线透射影像D.出根尖孔约1.5mm.根尖部根管内无任何X线透射影像E.仅在一个根管内,另一根根管内无任
根据下面材料,回答问题。2012年10月,中国制造业采购经理指数(PMI)为50.2%,比上月上升0.4个百分点,重新回到临界点之上。分企业规模看,大型企业PMI为50.9%,比上月上升0.7个百分点,连续2个月位于临界点以上:中型企业
《中华人民共和国教师法》是为了(),建设具有良好思想品德修养和业务素质的教师队伍,促进社会主义教育事业的发展而制定的。
治安行政管理工作的主要任务有( )。
A、 B、 C、 D、 A本题属于折叠题。B、C项中三角阴影的位置错误,D项中侧面的线条应为纵向,而非横向,故D项错误。所以选A项。
计算机的指令包括操作码和______。
最新回复
(
0
)