首页
登录
职称英语
Lichens may grow on the bark of a tree in a steaming tropical rain forest, o
Lichens may grow on the bark of a tree in a steaming tropical rain forest, o
游客
2023-12-27
10
管理
问题
Lichens may grow on the bark of a tree in a steaming tropical rain forest, on the bricks of big city buildings, on rocks in hot springs, on wind-swept mountaintops, and in the driest desserts. In the arctic, they provide the principal food for caribou, and they are one of the few plants that grow in Antarctica. They are pioneers, appearing in barren rocky areas and starting the formation of soil in which mosses, then ferns, and then other plants can take root.
Lichens are a partnership of two plants — fungi and algae. The lichen body is made up of a network of fungal strands. In the upper layers of these grow groups of algae. The two organisms live together to the benefit of both, a relationship known as symbiosis. The fungi provide support, absorb water, and shelter the tender algae from direct sunlight. The algae carry on photosynthesis and provide the fungi with food. The algae can live independently and are recognizable as a species that grows alone. The fungi, on the other hand, cannot live apart from their partners. They can be placed in known classes of fungi but are unlike any species that lives independently.
So definite are the form, color, and characteristics of these double organisms that for hundreds of years, they were classified as one. More than 15,000 "species" were named. If these organisms are classified as separate species, it is difficult to fit them into the existing system of classification. But if they are classified separately, these species of fungi seem rather strange. Lichens are a splendid example of the difficulties faced by taxonomists in classifying species. [br] The word "splendid" underlined in Paragraph 3 most probably means ______ .
选项
A、unique
B、improbable
C、excellent
D、famous
答案
C
解析
词义题型根据句意,选项C最符合原意;因此C为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3311127.html
相关试题推荐
WheninAustraliarecently,Ivisitedaeucalyptusforestthatwasoncethe
林边有个洞,叫白龙洞。传说《白蛇传》中的白娘子曾经在这里修炼。NeartheforestistheWhiteDragonCavewhichis
EarlyMaoriadaptedthetropicallybasedeastPolynesiancultureinlinewith
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
Lichensmaygrowonthebarkofatreeinasteamingtropicalrainforest,o
随机试题
图示结构各杆件截面和材料相同,A点水平位移最小的是( )。
信息技术服务标准(ITSS)所定义的IT服务四个核心要素是:人员、流程、资源和(
幼儿的户外活动时间在夏、秋季可安排多一些,冬季可适当缩短。一般每天的户外活动时间
A.血热证 B.血虚证 C.气虚证 D.血瘀证 E.气滞证恶露量多,色紫
药品批发企业的药品购进记录应保存A.4年B.3年C.2年D.超过药品有效期1年,
A. B. C. D.
银行理财产品按()分为开放式产品和封闭式产品。A.产品风险 B.投资
我国5年期国债期货合约标的为票面利率为( )的名义中期国债。A.1% B.2%
用于建设项目偿债能力分析的指标是()。A.总投资收益率 B.利息备付率 C.
下列选项中,反映建设工程非节奏流水施工时特点的有()。A.各专业工作队不能在施工
最新回复
(
0
)