首页
登录
职称英语
The long, wet summer here in the northeastern U.S. notwithstanding, there’s
The long, wet summer here in the northeastern U.S. notwithstanding, there’s
游客
2025-04-02
21
管理
问题
The long, wet summer here in the northeastern U.S. notwithstanding, there’s a world shortage of pure, fresh water. As demand for water hits the limits of finite supply, potential conflicts are brewing between nations that share transboundary freshwater reserves.
Many people ask why we cannot simply take it from the sea, using our sophisticated technology of desalinization. But a good water supply must be hygienically safe and pleasant tasting and water containing salt would corrode machinery used in manufacturing in addition to producing chemical impurities. Since more than 95% of our water sits in the salty seas, man is left to face the reality that most water on the surface of the earth is not available for us.
One very feasible way of sustaining our supply of freshwater is to protect the ecology of our mountains. Mountains and water go together, a fact to which Secretary General Kofi Annan has drawn attention more than once. From 30% to 60% of downstream fresh water in humid areas and up to 95% in arid and semi-arid environments are supplied by mountains. Without interference nature has its own way of purifying water—even though chlorination and filtration are still necessary as a precaution. In a mountainous area, aeration, due to turbulent flow and waterfalls, causes an exchange of gases between the atmosphere and the water. Agriculture, industry, hydroelectric generators and homes that need water to drink and for domestic use depend on these resources and, thus, we must protect mountainous areas as a means of survival. [br] The author believes that industry avoids salt water because ______.
选项
A、water is needed for livestock
B、crops must be considered before man-made products
C、it is used in desalinization plants
D、it causes corrosion
答案
D
解析
从第2段可知,海水腐蚀生产设备。因此D项为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/4022821.html
相关试题推荐
Thelong,wetsummerhereinthenortheasternU.S.notwithstanding,there’s
Thelong,wetsummerhereinthenortheasternU.S.notwithstanding,there’s
Thelong,wetsummerhereinthenortheasternU.S.notwithstanding,there’s
KunmingisuniqueinChina______itstemperaturevarieslittle,summerorwinter.
PresidentBushcametohisparent’scentury-oldsummerhomeontheMainecoastf
OnaSummereveningitis______tohearthejoyfulsoundoftheshepherd’sflute
Theheatinsummerisnoless______hereinthismountainregion.A、concentratedB
Myauntlosthercatlastsummer,butit______aweeklateratahomeinthenext
EveryonehasbeentryingtounderstandMichaelJackson’sdeaththissummer.W
Heissucha______thathebuiltaporchforhishouselastsummerduringhisvac
随机试题
Therewasatimeinmylifewhenbeautymeantsomethingspecialtome.Igue
JanHendrikSchon’ssuccessseemedtoogoodtobetrue,anditwas.Inonly
Humanity’sprimaleffortstosystematizetheconceptsofsize,shapes,andn
[originaltext]There’rereportsoffightsatanAustralianimmigrationdetent
Itwasnotsolongagothatparentsdroveateenagertocampus,saidatearf
某女,22岁。经期提前半年余,每次提前10天左右,月经量多,色深红,质黏稠、伴面
患者,女,65岁,肝硬化伴大量腹水。护士协助其取半卧位,原因是A.有利于腹水消退
单人对患者进行心脏复苏,人工循环与人工呼吸同时进行时,人工循环与人工呼吸的比例为
关于急性肾小球肾炎的叙述,正确的是A.常发生于感染后1周 B.大量蛋白尿多见
翼外肌上头起自()。A.蝶骨大翼的颞下面和颞下嵴 B.翼外板的外侧面
最新回复
(
0
)