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
At the first sight the planet Mars(火星)does not appear very welcome to any kind of life. It has very little oxygen and water, the
At the first sight the planet Mars(火星)does not appear very welcome to any kind of life. It has very little oxygen and water, the
admin
2014-08-25
41
问题
At the first sight the planet Mars(火星)does not appear very welcome to any kind of life. It has very little oxygen and water, the temperature at night is below -50°C and winds of 100 miles per hour cause severe dust storms. However, the surface of the planet seems to show that water flowed across it some time in the past, and it is believed that there is enough ice at the poles to cover the planet with water if it melts. Although there is no life on the Mars now, some scientists think that there may have been some form of life long time ago. At that time, the planet had active volcanoes; the atmosphere was thicker and warmer; and there was water. In fact, in some ways the Mars may have been similar to the Earth, where life exists.
Some people believe that the Mars could support life in the future if the right conditions were produced. The first step would be to warm the planet using certain gases which trap the Sun’ s heat in the planet’s atmosphere. With warmth, water and carbon dioxide, simple plants could begin to grow. These plants could slowly make the Mars more suitable for living. It is estimated that the whole process might take between 100,000 and 200,000 years. In the meantime, people could begin to live on the planet in special closed environments. They would provide a lot of useful information about conditions on the Mars and the problems connected with living there.
The author’ s attitude towards the possibility of life on the Mars in the future is______.
选项
A、doubtful
B、positive
C、negative
D、uninterested
答案
B
解析
推理判断题。要求判断作者对未来火星上有生命可能性的态度。第一段中作者表明火星上有流水的痕迹,两极有冰,有些科学家认为火星上曾经有生命存在。第二段作者分析了未来火星上生活的可能性。因此可以判断作者对火星上存在生命的态度是positive(积极的),故选B。
转载请注明原文地址:https://kaotiyun.com/show/9gxO777K
0
成人本科学位英语
相关试题推荐
(Noneofus)had(thefinalsay)inthismatter,and(therefore)itwasrecommendedthatwe(waited)fortheauthorities.
Peopleallovertheworldtodayarebeginningtohearandlearnmoreandmoreabouttheproblemofpollution.(14)Pollutionis
Formorethanthirtyyearsscientistshavebeensearchingforsignsoflifeonotherplanets.Mostofthesesearcheshavebeend
Nobodyintheclassexceptyouandme______totheprincipalabouttheairqualityproblems.
SomeofthestudentshavealreadylearnedenoughEnglishto______aconversationwithanativeEnglishspeaker.
正是那棵树在洪水中救了他们的命。
Itwasnotaseriousaccident;ourcarneedsonlysome______repairs.
Thesethreeteachersvary______theirmannerofteaching.
M:CanIseeademonstrationofthistaperecorder?W:_________
Georgewasresponsiblefortheaccidentbecausehedidn’tgivea______tootherdrivers.
随机试题
A.星形胶质细胞B.少突胶质细胞C.施万细胞D.卫星细胞参与形成周围神经系统无髓神经纤维()
A.amuseB.astonishmentC.deeplyD.discoveryE.earnestF.employedG.lyingH.pursueI.removedJ.
饮水氯化副产物主要有
题12~14:某一设有吊车的单层厂房柱(屋盖为刚性屋盖),上柱长Hu=3.5m,截面400mm×400mm,下柱长H1=10.Om,截面400×900mm,上、下柱均对称配筋,as=a’s=400mm。混凝土强度等级为C25,纵向受力钢筋采用HRB335级
将建筑物基础底面以下一定范围内的软弱土层挖去,换填无侵蚀性及低压缩性的散粒材料,从而加速软土固结的方法是()。
信用证项下作为制单和审单依据的相关国际惯例主要有()。
以下关于信用证业务的表述,正确的是:
学校有目的、有计划、系统地对学生进行德育的基本途径是()
InEurope,therehasbeenaseriousdeclineinphysicalactivityoverthepast50years.Adultsaged20-60years【C1】______500kca
通过“我的电脑”窗口,将D盘“图片”文件夹中“荷花jpg”文件复制到F盘的“风景”文件夹中。
最新回复
(
0
)