小伙伴們，GRE考試大家復(fù)習(xí)的怎么樣了呢？下面是幫考網(wǎng)分享的一些GRE考試閱讀部分的復(fù)習(xí)資料，一起來(lái)看看吧！

釋義及問(wèn)題：

5

He hypothesized that warmer conditions increase algal activity and DMS output, seeding more clouds, which cool the planet by blocking out the Sun.

他提出假設(shè)認(rèn)為，溫度上升使藻類(lèi)更活躍進(jìn)而產(chǎn)生更多的 DMS，更多云，云遮蔽陽(yáng)光使地球降溫。

6

Then, as the climate cools, algal activity and DMS level decrease and the cycle continues.

然后，作為(調(diào)節(jié))天氣的工具，藻類(lèi)活動(dòng)和 DMS 水平降低，周而復(fù)始。

7

In response to biologists who question how organisms presumably working for their own selfish ends could have evolved to behave in a way that benefits not only the planet but the organisms as well, cooling benefits the algae, which remain at the ocean surface, because it allows the cooled upper layers of the ocean to sink, and then the circulating water carries nutrients upward from the depths below.

有生物學(xué)家質(zhì)疑，生物理所當(dāng)然為自己服務(wù)，如何能進(jìn)化出一種既有利于地球又有利于自身的行為方式，(L)回應(yīng)這種質(zhì)疑說(shuō)，降溫對(duì)停留在海洋表面的藻類(lèi)有好處，因?yàn)樗试S冷卻的表層水下沉，進(jìn)而循環(huán)水流會(huì)把下方的營(yíng)養(yǎng)物質(zhì)攜帶到洋面。

8

Algae may also benefit from nitrogen raining down from clouds they have helped to form.

藻類(lèi)也可能從它們幫助形成的云層降水中獲得養(yǎng)分。

1. According to the passage, which of the following occurs as a result of cooling in the upper layers of the ocean?

A. The concentration of oxygen in the air above the ocean’s surface decreases.

B. The concentration of DMS in the air above the ocean’s surface increases.

C. The nutrient supply at the surface of the ocean is replenished.

D. Cloud formation increases over the ocean.

E. Marine algae make more efficient use of nutrients.

選 C

海面的營(yíng)養(yǎng)物質(zhì)得到補(bǔ)充。

根據(jù)句 7 最后部分：… the circulating water carries nutrients upward from the depths below.

A

海面上空的氧濃度降低，可能正確(參與反應(yīng)消耗掉一部分)，但文章沒(méi)說(shuō)，不符合 according to the passage 的要求，不選。

B

DMS 的濃度增加。未知信息，可能對(duì)但不選，理由同上。

D

海面上方造云加快。未知信息，不選。

E

海藻更高效地利用營(yíng)養(yǎng)物質(zhì)。下一題。

2. Which of the following is most similar to the role played by marine algae in the global climate control system proposed by Lovelock?

A. A fan that continually replaces stale air in a room with fresh air from outside.

B. A thermostat that automatically controls an air-conditioning system.

C. An insulating blanket that retains heat.

D. A filter used to purify water.

E. A dehumidifier that constantly removes moisture from the air in a room.

選 B

自動(dòng)控制空調(diào)的恒溫器。

thermostat 恒溫器，顧名思義，就是把溫度恒定控制在某種水平的裝置，還能自動(dòng)控制空調(diào)，跟文段所介紹的藻類(lèi)通過(guò) DMS 造云來(lái)控制 cooling process 的機(jī)制類(lèi)似。

3. The passage mentions the possible benefit to algae of nitrogen falling down in the rain most likely in order to

A. Provide support for Lovelock’s response to an objection mentioned in the passage.

B. Suggest that the climatic effects of DMS production have been underestimated.

C. Acknowledge that Lovelock’s hypothesis is based in part on speculation.

D. Demonstrate that DMS production alters the planet in more than one way.

E. Assert that algae are the sole beneficiaries of DMS production.

選 A

邏輯題。

結(jié)論：

藻類(lèi)通過(guò) DMS 控制天氣，是地球自我調(diào)節(jié)過(guò)程的一部分。

質(zhì)疑者：

藻類(lèi)當(dāng)然應(yīng)該進(jìn)化出對(duì)自己的生存有益的行為，怎么可能既對(duì)地球有益，同時(shí)對(duì)自己有益。

回應(yīng)：

藻類(lèi)產(chǎn)生的 DMS 參與造云，使地球表面(水面)冷卻的同時(shí)，也促成海水的熱交換產(chǎn)生水流，從下方運(yùn)輸營(yíng)養(yǎng)物質(zhì)給自己。對(duì)大家都好，它好我也好。

注意，至此，已經(jīng)證明了，藻類(lèi)的行為不但有利于地球，也有利于自己。這個(gè)邏輯過(guò)程是完整的。

而最后一句，Algae may also benefit from nitrogen raining down from clouds they have helped to form. 這一句也是為 回應(yīng)質(zhì)疑而服務(wù)的 。

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