Question

【題目】 You're probably used to the regular upgrades in our cell-phone networks. There was 2G, which came along in 199l, replaced with 3G in 2001, followed by 4G in 2009. Now we're hearing about the coming of 5G.

But 5G is a much bigger leap than before. 5G, of course, is much faster than 4G in the real world and a 5G phone in a 5G city will enjoy Internet speeds between 9 and 20 times as fast. The arrival of 5G also means enormous leaps forward in capacity－so much that every cell-phone plan will offer cheap, truly unlimited Internet access. “The consequences of that are huge,” says Sherif Hanna, Qualcomm's director of 5G marketing. For example, apps will no longer degrade (降低) your video quality or postpone downloading when you're out of Wi-Fi range. In fact, you'll probably prefer to do your downloads when you're on cellular (使用流量) because 5G will be much faster than whatever service you've got at home or work.

“However, not everyone is excited by the 5G development. The new standard gets its speed partly by using existing transmission(傳輸) frequencies more efficiently and partly by using the millimeter wave range. That's a big, juicy line of radio frequencies that are currently underused because millimeter wave is really hard to use,” Hanna says.

These frequencies are much higher than anything we've used for the cellular, which means they can offer unbelievable speed－but at the cost of range. Millimeter wave cellular towers have to be about 500 feet apart. Cell carriers not only will have to upgrade all their cell transceivers (called small cells) but will install(安裝) a lot more of them as well.

That's why the millimeter wave flavor of 5G, the superfast coverage, will be available only in densely populated cities such as New York and San Francisco. In suburban and rural areas, 5G will bring a speedup of “only” nine times faster.

【1】What advantages does 5G have over previous networks?

A.5G is much faster and more convenient.

B.5G allows users to download more videos.

C.5G can provide better service and news at home.

D.5G cell-phone plans are expensive but more accessible.

【2】Hanna's words in paragraph 3 reflect .

A.popularity of the coming of 5G

B.easy access to the 5G development

C.concern about the 5G development

D.excitement about the 5G development

【3】What can we learn about 5G according to the text?

A.It requires more cellular towers.

B.It won't be available in rural areas.

C.It won't show speed improvements in suburbs.

D.It makes some populated cities even more crowded.

【4】Where is the text most likely from?

A.A tour brochure.B.A science newspaper.

C.A medical magazine.D.An experimental textbook.

Answer 1

【答案】

【1】A

【2】C

【3】A

【4】B

【解析】

本文是說(shuō)明文。文章介紹了5G網(wǎng)絡(luò)的一些基本情況。

【1】細(xì)節(jié)理解題。根據(jù)第二段中的But 5G is a much bigger leap than before. 5G, of course, is much faster than 4G in the real world and a 5G phone in a 5G city will enjoy Internet speeds between 9 and 20 times as fast.（但5G的發(fā)展比以前大得多。當(dāng)然，在現(xiàn)實(shí)世界中，5G比4G快得多，5G城市中的5G手機(jī)將享受9到20倍的網(wǎng)速）可知，5G手機(jī)的網(wǎng)速將大幅度提高。由此可知，與以前的網(wǎng)絡(luò)相比，5G更快、更方便。故選A。

【2】推理判斷題。根據(jù)第三段中的“However, not everyone is excited by the 5G development…That's a big, juicy line of radio frequencies that are currently underused because millimeter wave is really hard to use,” Hanna says.（漢納說(shuō):“然而，并不是每個(gè)人都對(duì)5G的發(fā)展感到興奮……這是一個(gè)巨大的、有趣的無(wú)線電頻率線，目前還沒(méi)有得到充分利用，因?yàn)楹撩撞ㄕ娴暮茈y使用�！保┛芍�，漢納認(rèn)為并不是每個(gè)人都對(duì)5G的發(fā)展感到興奮，這種無(wú)線電頻率線，目前還沒(méi)有得到充分利用。由此推知，漢納在第3段中的話反映了對(duì)5G發(fā)展的擔(dān)憂。故選C。

【3】細(xì)節(jié)理解題。根據(jù)第四段中的Cell carriers not only will have to upgrade all their cell transceivers (called small cells) but will install(安裝) a lot more of them as well.（手機(jī)運(yùn)營(yíng)商不僅要升級(jí)他們所有的手機(jī)收發(fā)器(稱為小型小區(qū))，還要安裝更多的收發(fā)器）可知，5G不僅需要手機(jī)運(yùn)營(yíng)商升級(jí)他們所有的手機(jī)收發(fā)器，還要安裝更多的收發(fā)器。由此推知，5G需要更多的手機(jī)基站。故選A。

【4】推理判斷題。根據(jù)第一段中的There was 2G, which came along in 199l, replaced with 3G in 2001, followed by 4G in 2009. Now we're hearing about the coming of 5G.（1991年出現(xiàn)的2G, 2001年被3G取代，2009年又出現(xiàn)了4G�，F(xiàn)在我們聽(tīng)到了5G的到來(lái)）可知，本文主要介紹了5G網(wǎng)絡(luò)的一些基本情況。5G網(wǎng)絡(luò)的發(fā)展屬于科技進(jìn)步，結(jié)合選項(xiàng)可知，本文應(yīng)該來(lái)自科學(xué)報(bào)紙。故選B。