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
2024-04-29
22
管理
问题
If the population of the Earth goes on increasing at its present rate, there will【B1】______ not be enough resources left to【B2】______ life on the planet. By the middle of the 21st century, if present【B3】______continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of【B4】______the human race, the【B5】______ 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【B6】______, it will be possible to change the【B7】______ 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【B8】______amount of water there.
【B9】______. As soon as this has been done, the algae will be placed in small rockets.【B10】______. In a fairly short time, the algae will break down 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.【B11】______ [br] 【B2】
选项
答案
sustain
解析
此处需要一个原形及物动词,sustain是四六级核心词汇,此处表示“供给必需品及营养”。
转载请注明原文地址:https://tihaiku.com/zcyy/3575930.html
相关试题推荐
[originaltext]W:CouncilorManion,whatdoyouthinkoftheincreasinglyheavy
Withrapidgrowthofworldpopulation,mainlyindevelopingcountries,thea
Withrapidgrowthofworldpopulation,mainlyindevelopingcountries,thea
Inrecentdecades,franchising(专卖店)hasgrownincreasinglypopularandwides
Inrecentdecades,franchising(专卖店)hasgrownincreasinglypopularandwides
Inrecentdecades,franchising(专卖店)hasgrownincreasinglypopularandwides
Inrecentdecades,franchising(专卖店)hasgrownincreasinglypopularandwides
Inrecentdecades,franchising(专卖店)hasgrownincreasinglypopularandwides
Inrecentdecades,franchising(专卖店)hasgrownincreasinglypopularandwides
Inrecentdecades,franchising(专卖店)hasgrownincreasinglypopularandwides
随机试题
Therearevariouswaysinwhichindividualeconomicunitscaninteractwith
[originaltext](I):So,ifyousaythere’sacrisis,thenwhatdowedo?Now,yo
【B1】[br]【B9】[originaltext]Italiansareknownforthemandtheoriessugges
Whileanti-slaverysentimenteventuallydictatedpolicyinboththeUnitedS
Iamaveryluckygirlandmyfamilyisthenicestintheworld.Mummyand
It’sreportedthatbytheendofthisye
卫气行于()。A.肾中B.脉内C.脉外D.膻中E.以上均不是
湿阻中焦、脘腹胀满首选A.枳壳B.枳实C.山楂D.厚朴E.砂仁
关于贮存药物的叙述正确的是A.某些止咳药水遇冷可变黏稠,所以需要冷藏保存 B.
假设我国某商业银行是一家系统重要性银行,2015年年末,该银行的部分业务及监管指
最新回复
(
0
)