首页
登录
职称英语
All over Europe, and in North America, there’re lakes and forests which are d
All over Europe, and in North America, there’re lakes and forests which are d
游客
2024-07-05
40
管理
问题
All over Europe, and in North America, there’re lakes and forests which are dead or (71) and the (72) is thought to be acid rain. What is acid rain? Mr. Justin Cook, a scientist, explains: "All fossil fuels, (矿物燃料),that (73) oil, coal and gas, contain sulphur. When these are burnt, for example (74) motor vehicles, they form sulphuric acid (硫酸)This (75) UP into the air, and soon it falls back to (76) , into lakes and (77) trees in forests." This can cause many local problems. 78 a result, lakes become acidic, fish disappear and trees are killed. The pollution is carried great distances by the wind, so sulphuric acid (79) in Britain can travel as far as Scandinavia (斯堪的纳维亚). Czech is one of the countries with the most acid rains and large areas of (80) consist only (81) dead trees.
Is there (82) that can be done about acid rain? Mr. cook says: "The rain (83) of acid rain is (84) power stations to install filters that (85) the acid getting out into the air. Here in Britain, the only (86) that has been taken is that the chimneys are built (87) so that the pollution is more distributed." If the petrol used in motor vehicles (88) lead--free, then it Would be possible to filter exhaust fuses (废气) which are a (89) cause of pollution. But these filter mechanisms (机械装置)can not work (90) the leads is removed. [br]
选项
A、if
B、when
C、until
D、unless
答案
D
解析
句意:但是这些过滤机械装置不能起作用除非铅被去除掉。”四项中A是if表“如果”,B项when表示“当……时”,C项until表示“直到”,只有项unless(if...not)表示“除非,如果……不”。故选D为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3664081.html
相关试题推荐
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
AlloverEurope,andinNorthAmerica,there’relakesandforestswhichared
随机试题
Whatistheconversationmainlyabout?[originaltext]W:Whatareyoudoing?M:I
TheRedistributionofHope"HOPE"isoneofthemostove
MembersofParliamentarerequiredto_______alltheirfinancialinterests.A、dis
[originaltext]Trolleysrallyingdownaisles,endlesscheckoutqueues,andf
在政府财政收入中,属于非税收入的有A.公债利息 B.政府性基金 C.彩票公益
女性,50岁,急性坏死性胰腺炎。入院后出现进行性呼吸困难,面罩吸氧(氧流量5L/
A.病毒性感染B.罕见的白血病C.变态反应性疾病D.疟疾E.放射线照射单核细胞增
动脉血压升高可引起( )。A.心室等容收缩期延长 B.心室快速射血期延长
提出“学习风格”概念的学者是()。 A.奥苏伯尔 B.加涅 C.布鲁纳
(2020年真题)项目风险管理中,风险等级是根据( )评估确定的。A.风险因素
最新回复
(
0
)