3.Seen from space the Earth is covered in a blue mantle.It is a planet on which the continents are dwarfed (相形見絀)by the oceans surrounding them and the vastness of the marine area.
An astonishing 80 percent of all the life on Earth is to be found hidden beneath the waves and this vast global ocean pulses around our world driving the natural forces which keep life on our planet.
The oceans provide necessary sources of protein,energy,minerals and other products of use the world over and the rolling of the sea across the planet creates over half our oxygen,drives weather systems and natural flows of energy and nutrients around the world,transports water masses many times greater than all the rivers on land combined and keeps the Earth habitable.
Without the global ocean there would be no life on Earth.
It is seriously worrying,then,that we are damaging the oceans on a scale that is unimagnalbe to most people.
We now know that human activity can have serious influences on the vital forces working-on our planet.We have fundamentally changed our global climate and are just beginning to understand the consequences of that.As yet largely unseen,but just as serious,are the influences we are having on ihe oceans.A healthy ocean has diverse ecosystems and strong and healthy habitats.the actual state of our oceans is a far cry from this natural level.
A large quantity of human pressures are being exerted both directly and indirectly on ocean ecosystems the world over.Consequently ecosystems are collapsing as marine speciesare driven towards extinction and ocean habitats are destroyed.With the decrease and removement of their diversity,ocean ecosystems are losing their natural recovery.
59.The 2nd and the 3rd paragraphs are given mainly to describeD.
A.what the oceans look like
B.what the oceans are made up of
C.what live in the oceans
D.what functions the oceans have
60.The oceans provide all the following exceptC
A.various marine creatures
B.rich living resources
C.a(chǎn)ll natural forces
D.comfortable habitats for man
61.Man has not yet realizedA
A.that he has done harm to the oceans
B.that he has done harm to the planet
C.that he has benefited from the oceans
D.that he has benefited from the planet
62.The best title for this passage should beB
A.Protecting our planet
B.Defending our oceans
C.Making good use of our oceans
D.A glimpse of the oceans.
分析 本文主要介紹了海洋的作用,以及人類對海洋造成的破壞.在海洋中生活了各種各樣的生物,它為這些生物提供了舒適的棲息地,而且海洋里的資源也很豐富.但是人類活動對海洋生態(tài)系統(tǒng)造成了很大的傷害,因此我們應(yīng)該保護(hù)海洋.
解答 59.D 段落大意題.根據(jù)第二段this vast global ocean pulses around our world driving the natural forces which keep life on our planet.和整個(gè)第三段的內(nèi)容可知海洋為人類提供了很多資源.由此推知,這兩段都在說明海洋的作用.故選D.
60.C 細(xì)節(jié)理解題.根據(jù)第二段An astonishing 80 percent of all the life on Earth is to be found hidden beneath the waves可知在海洋中生活了各種各樣的生物.選項(xiàng)A正確;根據(jù)第三段The oceans provide necessary sources of protein,energy,minerals…可知海洋中生物資源很豐富.選項(xiàng)B正確;根據(jù)倒數(shù)第二段A healthy ocean has diverse ecosystems and strong and healthy habitats可知海洋為生物提供了舒適的棲息地.選項(xiàng)D正確.而選項(xiàng)C是對文章的錯(cuò)誤理解.故選C.
61.A 細(xì)節(jié)理解題.根據(jù)倒數(shù)第二段As yet largely unseen,but just as serious,are the influences we are having on ihe oceans.可知人類尚未意識到他們已經(jīng)傷害了海洋.故選A.
62.B 標(biāo)題概括題.通讀全文可知,本文主要介紹了海洋的作用,以及人類對海洋造成的破壞,并且告誡人們要保護(hù)海洋.故選B.
點(diǎn)評 本文考察學(xué)生的理解推斷能力以及細(xì)心程度,只要抓住文章的關(guān)鍵詞,采用尋讀的方法查找細(xì)節(jié),就能找到正確答案.