首页
登录
职称英语
Forest is a complex ecosystem in which trees are the dominant life form. Tre
Forest is a complex ecosystem in which trees are the dominant life form. Tre
游客
2023-08-30
46
管理
问题
Forest is a complex ecosystem in which trees are the dominant life form. Tree dominated forests can occur wherever the temperatures rise above 50°F(10℃) in the warmest months and the annual【C1】______ is more than 8 in. (200mm). They can develop under various conditions within these limits, and the kind of soil, plant, and animal life differs according to the extremes of environmental influences. In cool, high-latitude subpolar regions, taiga forests are dominated by【C2】______ conifers (针叶松). In more temperate high-latitude climates, mixed forests of both conifers and broad-leaved deciduous trees【C3】______ . Broad-leaved deciduous forests develop in midlatitude climates. In humid equatorial climates, tropical rain forests develop. There heavy rainfall supports evergreens that have broad leaves instead of the needle leaves of cooler evergreen forests. Forests are among the most complex ecosystems in the world, with extensive vertical layering. Conifer forests have the simplest structure: a tree layer, a shrub layer that is【C4】______ or even absent, and a ground layer covered with lichens, mosses, and liverworts. Deciduous forests are more complex (the tree canopy is divided into an upper and lower story), and rain-forest canopies are divided into at least three layers. The forest is nature’s most efficient ecosystem, with a high rate of【C5】______ affecting both plant and animal systems in complex organic relationships.
Rain forest is lush forest, generally composed of tall, broad-leaved trees and usually found in wet tropical regions around the equator. Depending on the amount of annual rainfall, the trees may be evergreens or mainly deciduous. The former require more water. Soil conditions vary with location and climate, though most rain-forest soils tend to be permanently moist and not very【C6】______ , because the hot, humid weather causes organic matter to decompose rapidly and to be absorbed quickly by tree roots and fungi. Rain forests have many vertical layers of plant and animal development. The highest plant layer, the tree canopy,【C7】______ to heights of 100-165 ft (30-50 m). Animals there mostly feed and escape from predators among leaves and branches. The next-highest layer is filled with small trees. Above the ground surface the space is occupied by tree branches, twigs, and 【C8】______ . Many species of animals live in the undergrowth. Contrary to popular belief, the rain forest floor is not impassable, being bare except for a thin layer of humus and fallen leaves. Animals【C9】______ this layer are adapted to walking and climbing short distances Burrowing animals are found below the soil surface, as are microorganisms that help decompose and free much of the organic litter accumulated by other plants and animals from all layers. The climate of the ground layer is unusually【C10】______ because the upper stories of tree canopies and the lower branches filter sunlight and heat radiation and reduce wind speeds, keeping the temperatures fairly even.
A. resort I. extends
B. stable J. inhabiting
C. conform K. predominate
D. foliage L. biology
E. fertile M. spotty
F. apprentice N. precipitation
G. photosynthesis O. perishing
H. hardy [br] 【C1】
选项
答案
N
解析
precipitation名词,意为“降水”。本句的意思是年降水量多于200毫米。
转载请注明原文地址:https://tihaiku.com/zcyy/2969842.html
相关试题推荐
Accordingtoscientificresearch,______(狗也会产生嫉妒等复杂感情).dogsarepronetocomplex
TheGeneralElectricCompany,oftencriticizedforthecomplexityofitsstr
TheGeneralElectricCompany,oftencriticizedforthecomplexityofitsstr
TheGeneralElectricCompany,oftencriticizedforthecomplexityofitsstr
Forestisacomplexecosysteminwhichtreesarethedominantlifeform.Tre
Forestisacomplexecosysteminwhichtreesarethedominantlifeform.Tre
Forestisacomplexecosysteminwhichtreesarethedominantlifeform.Tre
Forestisacomplexecosysteminwhichtreesarethedominantlifeform.Tre
Forestisacomplexecosysteminwhichtreesarethedominantlifeform.Tre
TheGeneralElectricCompany,oftencriticizedforthecomplexityofitsstr
随机试题
IaskedmymotherifIcouldgoout,andshe______.A、descendedB、contentedC、co
[originaltext]Californiaisalandofvarietyandcontrast.Almosteverytyp
关于肾前性急性肾衰竭病因,不正确的是A.血管内血容量不足 B.心排血量降低
信托的基本特征包括( )。A.以信任为基础,受托人应具有良好的信誉 B.信托
甲建设单位与乙施工单位签订了施工总承包合同,乙施工单位将其中的一部分工程分包给丙
在货币供给一定的条件,货币乘数与基础货币成正比。
李清现年50岁,夫妻感情一直不错,最近这段时间以来,李清开始出现情绪不稳定、易激
“四个一”背后的千年大计 习主席在今年概括出了中国共产党关于生态
均能滋阴清热,主治阴虚血热所致的月经先期、经血量多的中成药是A.八珍益母丸 B
屋面防水工程应满足的要求是()。A.结构找坡不应小于3% B.找平层应留设间距
最新回复
(
0
)