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
Life on land probably began about 430 million years ago, though it has existed in the water for perhaps much as 3 000 million ye
Life on land probably began about 430 million years ago, though it has existed in the water for perhaps much as 3 000 million ye
admin
2009-07-15
27
问题
Life on land probably began about 430 million years ago, though it has existed in the water for perhaps much as 3 000 million 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. They supplied the first land animals with the surrounding and food necessary, since the plants 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 and needed water in which to reproduce. Once their 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 (根), and some had got tree-like forms since height was very important in gaining sunlight. About 300 million years ago, much of the world was covered with forests of huge trees. In most ways they were like modem trees. They had roots, leaves, wood, but mostly they had not developed seeds.
选项
A、life on land probably began about 430 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
见第一段...no animals could have been living if plants had not been on land first.
转载请注明原文地址:https://kaotiyun.com/show/S0yd777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
Mrs.Wilsonworksmoreslowlythantheothersecretariesbecauseshetakespride______everythingthatshedoes.
Treasurehunts(寻宝)haveexcitedpeople’simaginationforhundredsofyearsbothinreallifeandinbookssuchasRobertLouis
Decision-thinkingisnotunlikepoker—itoftenmattersnotonlywhatyouthink,butalsowhatothersthinkyouthinkandwhatyo
AnoldladylivedinavillagewentmtownoneSaturday,andafter【S1】______shehadboughtsomefruitandv
Shetookanumbrellawithherthismorning______sheshouldbecaughtintherain.
Itiswellknownthat______doctorsarebadlyneededinthehospital.
Hedied______cancer______awinternight.
Whatdotheyeatforlunchandforsupper?
RecentlyIwasinvitedtoafriend’shouseforsupper—andhadamealIhadneverhadbefore.Allthefriendsinvitedwerea
Canyoubelieveit?There’saworldpapershortage.There’sanationalbottleshortage,andwe’rerunningoutofrawmaterialsl
随机试题
某女,58岁。两年前曾患“中风”经治已愈,之后逐渐出现善忘呆滞,言语模糊不清,行为古怪,孤僻,时哭时笑,诊见两目暗晦、舌暗、脉细涩。若患者日久兼气血不足应
患者,男,32岁。鼻流浊涕,色黄腥秽,舌淡。治疗除局部选穴外,应选用
(2019年真题)根据我国宪法,中国特色社会主义最本质的特征是()。
在GIS空间数据中,()为非空间数据。
拟建某冶金企业年产钢200万t,工作制度为年工作365d,厂址地处丘陵地带,坡度在20°~30°,丘陵之间距离紧密。据调查,企业纳污水体全长约为128km,流域面积为1200km2,年平均流量为78m3/s,河宽为30~50m,水深为5~7m,枯水期为12
甲股份有限公司(以下简称甲公司)系一家上市公司,2012年至2叭4年对乙股份有限公司(以下简称乙公司)股权投资业务的有关资料如下:(1)2012年5月16日,甲公司与乙公司的股东丙公司签订股权转让协议。该股权转让协议规定:甲公司以5400万元收购丙公司持
按照《合同法》规定,寄送的价目表、招标公告、招股说明书等为()
瓯绣是我国()地区的名绣。
A、Theyarelimitedto46,000dollars.B、Theyriseconsiderablycomparedwithlast.C、Theyfalldowninonly50kindsofjobs.D
Thetenantmustbepreparedtodecoratethehouse______thetermsofthecontract.
最新回复
(
0
)