【題目】 As the novel corona-virus (新型冠狀病毒) spreads throughout China and the rest of the world, an important question has yet to be answered: where did the virus come from?

The latest study showed that pangolins (穿山甲) may be an intermediate (中間的) host of virus, according to Xinhua. However, bats are suspected to be the original cause.

"We don't know the source yet, but there's pretty strong evidence that this is a bat origin corona-virus," said Peter Dazsak, president of Eco-Health Alliance, an environmental nonprofit (非營利機(jī)構(gòu)), according to The New York Times. "When you look at the genetic sequence (基因序列) of the virus, and you match it up with every known corona-virus, the closest ones are from bats," Dazsak also told CNN.

So why are bats the source of so many deadly kinds of viruses and why don't they suffer from any symptoms (癥狀)? Bats are mammals (哺乳動(dòng)物) that have a long lifespan (壽命) and live with millions of other bats in caves, where they can potentially spread the virus far and wide. As the only lying mammal, their body temperature is high, similar to a fever It's this fact that may contribute to bats' unique immune system (免疫系統(tǒng)) in protecting from the ill effects of viruses.

But are bats truly to blame for the virus or should we be blaming ourselves? It's the fault (錯(cuò)誤) of humans for decreasing (減少) the distance between us and virus-carrying bats. Bats are an important animal in our ecosystem (生態(tài)系統(tǒng)) when it comes to pollinating (授粉) many fruits such as mangoes, bananas and avocados. We need to allow them to continue pollination and keep them away from our markets and mouths.

【1】What can we learn about the origin of COVID-19?

A.Bats have been discovered to be its original cause.

B.Pangolins are now considered the most likely source.

C.It's confirmed by comparing sources of several different viruses.

D.The virus was found to be genetically similar to those see in bats.

【2】Why don't bats suffer from the corona-virus?

A.Their low body temperature protects them.

B.Bats have a unique immune system.

C.Bats are the only flying mammal to live in groups.

D.Living in caves helps bats fight against viruses.

【3】What is the main point the author makes in the last paragraph?

A.Virus-carrying bats should be killed.

B.Humans should stay away from bats.

C.Bats benefit but also harm our ecosystem.

D.Bats could spread Viruses during pollination.

【答案】

【1】D

【2】B

【3】B

【解析】

本文介紹了隨著新型冠狀病毒在中國和世界的傳播，病毒來源是哪里尚未清楚。最新研究表明穿山甲是病毒的中間寄主，而蝙蝠也被懷疑是病毒的直接來源。人們毀壞并接觸了蝙蝠的生活區(qū)域，使自身處在患病風(fēng)險(xiǎn)之中。蝙蝠是生態(tài)系統(tǒng)的重要組成部分，人類不該打破生態(tài)平衡。

【1】細(xì)節(jié)理解題。題干意思為：關(guān)于新冠病毒我們了解多少。根據(jù)“We don't know the source yet,”我們還不知道病毒的來源。可知，A選項(xiàng)錯(cuò)誤。根據(jù)“The latest study showed that pangolins (穿山甲) may be an intermediate (中間的) host of virus,”最新研究表明，穿山甲可能是病毒的中間宿主。而不是病毒的來源，因此B錯(cuò)誤。根據(jù)“When you look at the genetic sequence (基因序列) of the virus, and you match it up with every known corona-virus, the closest ones are from bats,”當(dāng)你觀察病毒的基因序列，并將其與所有已知的冠狀病毒相匹配時(shí)，最接近的病毒來自蝙蝠�？芍�，C選項(xiàng)說通過比對(duì)眾多病毒確認(rèn)了新冠病毒的來源，是錯(cuò)誤的，只是相似而不是確定。而選項(xiàng)D說該病毒被發(fā)現(xiàn)與蝙蝠攜帶的病毒相似。因此D正確。

【2】細(xì)節(jié)理解題。題干意思是：為什么蝙蝠不會(huì)感染新冠病毒。根據(jù)“their body temperature is high, similar to a fever,”它們的體溫很高，與發(fā)燒相似。A選項(xiàng)說蝙蝠的身體低溫保護(hù)了它們，錯(cuò)誤。根據(jù)“It's this fact that may contribute to bats' unique immune system (免疫系統(tǒng)) in protecting from the ill effects of viruses.”可知，蝙蝠獨(dú)特的免疫系統(tǒng)能免受病毒的有害影響。因此B正確。根據(jù)“As the only lying mammal,”作為唯一躺著的哺乳動(dòng)物。C選項(xiàng)說蝙蝠是唯一的群居的飛行哺乳動(dòng)物，是錯(cuò)誤的。根據(jù)“live with millions of other bats in caves,”與數(shù)百萬只蝙蝠生活在洞穴中�？芍�，D選項(xiàng)說蝙蝠居住在洞穴，這幫助了它們對(duì)抗病毒，文中并未提到，錯(cuò)誤。故B符合題意。

【3】細(xì)節(jié)理解題。題干意思為：作者在最后一段中提出的觀點(diǎn)是什么？根據(jù)“We need to allow them to continue pollination”我們應(yīng)該允許他們繼續(xù)授粉�？芍鸬氖诜蹖�(duì)生態(tài)系統(tǒng)是有益的，不應(yīng)該殺害，A、C選項(xiàng)錯(cuò)誤；根據(jù)“Bats are important animal in our ecosystem（生態(tài)系統(tǒng)）when it comes to pollinating（授粉）many fruits,”當(dāng)談及授粉時(shí)候，蝙蝠在我們的生態(tài)系統(tǒng)中是非常重要的�？芍�，D為過度推測（蝙蝠能通過授粉傳播病毒），排除。根據(jù)“keep them away from our markets and mouths.”他們遠(yuǎn)離我們的市場和餐桌。可知，我們應(yīng)該遠(yuǎn)離蝙蝠，綜合可知B選項(xiàng)正確。

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