首页
登录
职称英语
If the population of the Earth goes on increasing at its present rate, there
If the population of the Earth goes on increasing at its present rate, there
游客
2024-04-19
27
管理
问题
If the population of the Earth goes on increasing at its present rate, there will eventually not be enough resources left to【B1】______ life on the planet. By the middle of the 21st century, if present 【B2】______continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the【B3】______conditions on Earth will make it necessary for us to look for open space somewhere else.
An American scientist, Professor Carl Sagan, believes that before the earth’s resources are completely【B4】______,it will be possible to change the atmosphere of Venus and so create a new world almost as large as Earth itself. The difficulty is that Venus is much hotter than the Earth and there is only a tiny amount of water there.
Sagan【B5】______that algae (藻类),organism that can live in【B6】______hot or cold atmospheres and at the same time produce oxygen, should be【B7】______in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets.Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will【B8】______the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler but before man can set foot on Venus, it will be necessary for the oxygen to produce rain. The【B9】______of the planet will still be too hot for men to【B10】______it but the rain will eventually fall and in a few years something like Earth will be reproduced on Venus. [br] 【B7】
选项
答案
bred
解析
此处需要填入动词的过去分词,与前面的be一起表被动。bred的原形为breed"培育”。
转载请注明原文地址:https://tihaiku.com/zcyy/3562123.html
相关试题推荐
AresearchpresentedtotheAAASmeetinginSanDiegosuggeststhatmuchof
AresearchpresentedtotheAAASmeetinginSanDiegosuggeststhatmuchof
AresearchpresentedtotheAAASmeetinginSanDiegosuggeststhatmuchof
AresearchpresentedtotheAAASmeetinginSanDiegosuggeststhatmuchof
AresearchpresentedtotheAAASmeetinginSanDiegosuggeststhatmuchof
AresearchpresentedtotheAAASmeetinginSanDiegosuggeststhatmuchof
[originaltext]Untilthe20thcentury,mostpaintingswererepresentational.
[originaltext]Untilthe20thcentury,mostpaintingswererepresentational.
TheUnitedNationssaystheworld’spopulationwillincreaseby34percentb
Thehugegrowthofglobal"ecotourism"industryisbecominganincreasingco
随机试题
Personalityistoalargeextentinherent—A-typeparentsusuallybringabout
Ifyouintendusinghumourinyourtalktomakepeoplesmile,youmustknow
YearafteryearadedicatedSwedishchemistworkedtofindasubstancewhich
WhatwerethethingsinBritainthatDr.Mathewfoundmoststrangewhenhefirst
Inthecourseofmyschooling.Iwillneverforget____________(所遇到的大困难)inlearn
直径为100的给水管道水平干管安装,保温管中心距离墙表面的安装距离最小为()。A
ELISA检测法适用于下列哪类细胞因子的检测A.各种细胞因子 B.促进细胞增殖
补充酪氨酸可“节省”体内的A.苯丙氨酸 B.组氨酸 C.蛋氨酸 D.赖氨酸
下列选项中不符合《义务教育历史课程标准(2011年版)》中“课程理念”的一项是(
男性,58岁,反复咳嗽、咳痰15年,心悸、气急3年。体检:双肺叩诊呈过清音,呼吸
最新回复
(
0
)