首页
登录
职称英语
Life on land probably began about 430 million years ago, though it has exist
Life on land probably began about 430 million years ago, though it has exist
游客
2025-03-17
2
管理
问题
Life on land probably began about 430 million years ago, though it has existed in the water for perhaps as long as 3, 000 mil lion years. When we think of the first life on land, we probably think of strange animals coming out of the oceans, but, in fact, no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. (76)
They supplied the first land animals with food necessary to live, since they are the only form of life that is able to get and store energy.
The first plants to exist out of the water were probably certain kinds of algae(海藻) which were followed by other plants that grew close to the ground near water and needed water in which to repro duce. Once the move to land had been made, however, evolution (进化) took place quickly. By the end of 100 million years, plants had developed their roots, and some developed tall tree like forms, since height was very important in competing for sunlight. About 300 million years ago, much of the world was covered with forests of huge trees. In most ways they were like modern trees. They had roots, leaves, wood, but mostly they had not developed seeds.
选项
A、life on land probably began about 4, 300 years ago
B、the first animal on land came from oceans
C、there wouldn’t be animals without plants
D、plants are the only form of life that is able to get and store energy
答案
C
解析
ABD项都是第一段巾的内容,但都不是主要内容,如果没有看清楚题目中要求的main idea,这道题很有可能选错,因为ABD项都是第一段中的内容,如果看清楚题目中问的是主要内容,那么这道题并没有什么难度。第一段就是说明陆地上如果首先没有植物,动物将无法生存。因此正确答案应该是C。
转载请注明原文地址:https://tihaiku.com/zcyy/4000832.html
相关试题推荐
Iwrotehimalettertoshowmy______ofhisthoughtfulness.A、expectationB、con
Althoughwehadn’tmetfor20years,Irecognizedhim______Isawhim.A、themom
Hethoughtthepaintingwasoflittle______,soheletmehaveitforonlyten
Jackhas(set)hismind(togoto)collegenextyear(eventhough)hehasn’t(sa
(Lostinthought),she(didn’thear)thethunder(tobegin)inthemountains(fa
(Eventhough)he(hadbeenstudying)Englishforthreeyears(before)hecameto
ThePanamaCanalwasconstructedin1915______threehundredfiftymilliondoll
(Lostinthought),she(didn’thear)thethunder(tobegin)inthemountains(fa
【B1】[br]【B5】A、asB、thoughC、whenD、untilB逻辑推理。根据句子的逻辑关系。“曾经抓到”与“没有证据”之间为转折关系,
【B1】[br]【B4】A、evenB、hardlyC、certainlyD、probablyA副词的使用。根据句子的逻辑关系。“抓住”比“知道”更
随机试题
Eleven-year-oldAngelawasstrickenwithadebilitating(衰弱的)diseaseinvol
ScientistsscanningandmappingtheGizapyramidssaythey’vediscoveredtha
Inmanycountries,authorityisseldomquestioned,eitherbecauseitishigh
雨淋喷水灭火系统手动控制方式:将雨淋阀组的启动和停止按钮、雨淋消防泵控制箱(柜)
磁化指在外磁场中,物质被磁化的程度。()
下列( )矿物不属于黏土矿物。A、高岭石 B、长石 C、蒙脱石 D
慢性支气管炎的病因复杂,哪些为有关的致病因素( )A.吸烟 B.空气潮湿
在肘横纹中,肱二头肌腱尺侧凹陷处的腧穴是A.少海 B.郄门 C.曲池 D.
关于免疫比浊法,叙述错误的是A.免疫比浊法属散射光谱分析法 B.免疫比浊法分透
(1)救治无效,家属告状(2)身患重病,借款购药(3)企业胜诉,报社致歉(4)药
最新回复
(
0
)