Question

【題目】

Scientists have discovered a new kind of invisible ink. It’s called water. And all you need for this secret-messaging ink to work is to write with it on a super-hi-tech piece of paper coated with special chemicals. 【1】 It shows up darker than the surrounding paper under UV(紫外線的) light.

When the message has been read and needs to be hidden again, get out your hairdryer, and blow some warm air on the paper. 【2】

Using hot air from a hairdryer for 15-30 seconds, you were able to reuse the special paper up to 30 times because the heat reorganized the chemical structure of the paper coating. 【3】

The invention was made by a group of scientists in China, led by Qiang Zhao of the Institute of Advanced Materials, Nanjing University of Posts and Telecommunications.

Although much of modern communication is digital(數(shù)碼的), there are still some situations in which it is important to send messages on a piece of paper, such as when the people don’t have Internet. 【4】 But the problem has always been how to get rid of a message once it has been shown so no one else can read it.

【5】. To use it, write with the lemon juice on ordinary paper, iron(熨) the paper with a hot iron and the hidden message will appear. The downside(缺點(diǎn)) is that the paper has to be destroyed to hide the message so no one else can read it.

A.How to make the invisible ink? Follow the steps.

B.Invisible inks have long been used to send secret messages.

C.Without the heat, the message stayed visible for up to three months.

D.Previously, the most readily available invisible ink was lemon juice.

E.Shine a UV light on the coated paper and the water message becomes visible.

F.Then the message will be gone and the paper can be reused, which keeps costs low.

G.Putting water on the paper broke up the structure of the chemicals it was coated with.

Answer 1

【答案】

【1】E

【2】F

【3】C

【4】B

【5】D

【解析】

這是一篇說明文。文章介紹了隱形墨水的使用方法，優(yōu)缺點(diǎn)等。

【1】

根據(jù)第一段的內(nèi)容可知，該段介紹的是隱形墨水的使用原理，上一句提到“要讓這種傳遞秘密信息的墨水發(fā)揮作用，你只需要在涂有特殊化學(xué)物質(zhì)的超級(jí)高科技紙上寫字�！背薪由衔模�E選項(xiàng)“用紫外光照射涂后的紙，水的信息變得清晰可見�！鼻蓄}。下文“在紫外線下，它比周圍的紙顏色更深�！睂�(duì)E選項(xiàng)做了解釋說明。且該選項(xiàng)中的UV light，coated paper與前后文相對(duì)應(yīng)。故選E項(xiàng)。

【2】

第二段講述了當(dāng)信息讀完需要再次隱藏時(shí)的做法，上一句提到“拿出你的吹風(fēng)機(jī)，吹一些熱風(fēng)在紙上”承接上文，F選項(xiàng)“然后，信息就會(huì)消失，紙張就可以重復(fù)使用，這就降低了成本�！鼻蓄}。該選項(xiàng)中“the message will be gone” 信息就會(huì)消失和上文呼應(yīng)。故選F項(xiàng)。

【3】

第三段介紹了隱形墨水的重復(fù)使用的有關(guān)事項(xiàng)，上一句提到“用吹風(fēng)機(jī)吹15-30秒的熱風(fēng)，你可以重復(fù)使用這種特殊的紙多達(dá)30次，因?yàn)闊崃恐亟M了紙涂層的化學(xué)結(jié)構(gòu)。”，是經(jīng)過加熱后的紙張的的使用情況，承接上文，C選項(xiàng)“在沒有加熱的情況下，這條信息可以持續(xù)3個(gè)月�！鼻蓄}。故選C項(xiàng)。

【4】

前句提出，人們?cè)谝恍┣闆r下不得不使用紙張來傳遞信息。B選項(xiàng)“長(zhǎng)期以來，隱形墨水一直被用來發(fā)送秘密信息�！笔乔熬涞慕Y(jié)果，正因?yàn)椴坏貌皇褂眉垙�，隱形墨水才會(huì)得到長(zhǎng)期的應(yīng)用。下文“但問題一直是，一旦消息顯示出來，如何刪除它，這樣其他人就無法閱讀它�！笔侨藗冮L(zhǎng)期使用墨水所遇到的問題。在此處，B選項(xiàng)能夠起到承上啟下的作用。使語義通順。故選B項(xiàng)。

【5】

根據(jù)下文“用檸檬汁在普通紙上書寫來使用它，用熱鐵熨，隱藏的信息就會(huì)出現(xiàn)�！笨芍�，該段介紹了檸檬汁作為隱形墨水的使用方法。D選項(xiàng)“在此之前，最常見的隱形墨水是檸檬汁�！鼻蓄}。且該選項(xiàng)中的 lemon juice與后文相對(duì)應(yīng)。故選D項(xiàng)。

七選五的解題技巧之一是根據(jù)上下文詞匯來鎖定線索。即：要關(guān)注空白前后的名詞和動(dòng)詞，然后在選項(xiàng)中查找它們的近義詞、反義詞、同義詞、同類詞等。其次是一些專有名詞，比如說數(shù)詞、代詞、時(shí)間、年代、地點(diǎn)/名稱等。在本文中，第1小題中的“UV light，coated pape”，第2小題中的“he message will be gone”，第5小題中的“ lemon juice”均與上下文有相呼應(yīng)的詞語。