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1、課時提升作業(yè)七必修七必修2 unit 2the olympic games(限時限時35分鐘分鐘). 閱讀理解 we can video chat with astronauts aboard the international space station and watch live footage(直播) from the frozen heights of everest. but communicating with a submarine(潛艇) or a diver is not so easy. the lack of practical methods for sharing
2、data between underwater and airborne devices has long been a frustration for scientists. the difficulty originates from the fact that radio signals work perfectly in air travel but poorly in water. sonar(聲吶) signals used by underwater sensors reflect off the surface of the water rather than reaching
3、 the air. now, researchers at mit have developed a method with the potential to revolutionize underwater communication. “what weve shown is that its actually feasible to communicate from underwater to the air, ” says fadel adib, a professor at mits media lab, who led the research. the mit researcher
4、s designed a system that uses an underwater machine to send sonar signals to the surface, making vibrations(震動) corresponding to the 1s and 0s of the data. a surface receiver then reads and decodes these tiny vibrations. the researchers call the system tarf. “it has a number of potential real-world
5、uses, ” adib says. it could be used to find downed planes underwater by reading signals from sonar devices in a planes black box and it could allow submarines to communicate with the surface. right now the technology is low-resolution. the initial study was conducted in the mit swimming pool at maxi
6、mum depths of around 11 or 12 feet. the next steps for the researchers are to see if tarf is workable at much greater depths and under varying conditionshigh waves, storms, schools of fish. they also want to see if they can make the technology work in the other directionair to water. if the technolo
7、gy proves successful in real-world conditions, expect“texting while diving” to be the latest underwater fashion. 【文章大意】這是一篇說明文, 講述的是水下與陸地上的通信在之前是無法實現(xiàn)的。隨著科技的進(jìn)步, 這一通訊逐漸能夠變?yōu)楝F(xiàn)實。1. what does the author mainly talk about in paragraph 1? a. the future of video chat underwater and in air. b. the difficulty
8、of communication from water to air. c. the frustrations of developing underwater devices. d. the current situation of communicating with a submarine. 【解析】選b。細(xì)節(jié)理解題。根據(jù)第一段的第二、三句“but communicating with a submarine or a diver is not so easy. the lack of practical methods for sharing data between underwat
9、er and airborne devices has long been a frustration for scientists. ”可知, 從水里向空氣中傳遞信息, 進(jìn)行交流是很困難的。2. what does the underlined word “feasible” mean? a. changeable. b. convenient. c. achievable. d. alternative. 【解析】選c。詞義猜測題。根據(jù)第二段的第一句“now, researchers at mit have developed a method with the potential to
10、revolutionize underwater communication. ”可推斷海底與外界的溝通實際上是可行的。所以該詞的意思是“可行的, 可實現(xiàn)的”。3. what do we know about tarf? a. it is widely used to find downed planes. b. it can work well at great depths underwater. c. it is an underwater machine that sends signals. d. it can send, receive and read signals from
11、underwater. 【解析】選d。細(xì)節(jié)理解題。根據(jù)第三段前三句內(nèi)容可知, tarf系統(tǒng)可以從水下發(fā)送、接收和讀取信號。4. which of the following is the best title for the passage? a. the real-world uses of sonar technologyb. a breakthrough in the application of video chatc. full water-to-air communication closer to realityd. tarf becoming a new means of co
12、mmunication【解析】選c。標(biāo)題歸納題。根據(jù)第一段的最后兩句和第二段的第一句可知, 本文講述的是水下與陸地上的通信在以前是無法實現(xiàn)的, 但隨著科技的進(jìn)步, 這一通訊逐漸能夠變?yōu)楝F(xiàn)實。. 完形填空pennsylvania is full of mysterious places! one of those is an old turnpike(收費高速公路)_1_ for decades. my dad loves history, and he learned it was open to the public. _2_, when i was 14, we took a bike t
13、rip to _3_ this road! my dad chose a 16-mile _4_ of the road for us to ride. part of it included an old tunnel called sideling hill which is over a mile long! to _5_, we checked our tires and made sure our lights had batteries. in the morning, we loaded our bikes into the car and set off. as we appr
14、oached the tunnel, i felt _6_ as it was absolutely black inside! but dad encouraged me. he said he would be beside me. he reminded me to stay _7_ and keep my light on! when we _8_ the tunnel, the sound of our bikes was heard through the darkness. i shined my flashlight around and saw walls _9_ in gr
15、affiti(涂鴉). and i felt like i was being _10_! i was pretty scared, but _11_ on following dad helped me relax. after riding half-way through, i could see light coming from the other end motivating me to keep going. and i was so delighted to ride out into the bright afternoon! whenever going through _
16、12_ in life, i remember this trip. it reminds me that my father is always beside me. he turns on the light of hope in my _13_, and gives me _14_ to keep riding through lifes _15_ tunnels. 【文章大意】本文是一篇記敘文。文章主要講述了作者與父親共同穿越隧道的經(jīng)歷, 以及這次經(jīng)歷帶給作者的感受。1. a. designedb. abandonedc. destroyedd. locked【解析】選b??疾閯釉~辨析
17、。根據(jù)語境可知, 賓夕法尼亞州有一段已經(jīng)被廢棄了幾十年的高速公路。故選b。2. a. howeverb. otherwisec. therefored. meanwhile 【解析】選c??疾楦痹~辨析。根據(jù)上文中的“he learned it was open to the public”及語境可知, 父親了解到這條公路對公眾開放, 因此作者和父親騎自行車去探索這條被廢棄了幾十年的路。故選c。3. a. exploreb. constructc. protectd. repair【解析】選a??疾閯釉~辨析。根據(jù)上文中的“we took a bike trip”及語境可知, 作者和父親騎行去探索
18、這條公路。故選a。4. a. tunnelb. sectionc. blockd. course【解析】選b??疾槊~辨析。根據(jù)語境可知, 作者的父親選擇了一段16英里長的路程, 此處表示總路程的一部分。故選b。5. a. participateb. registerc. cooperated. prepare【解析】選d??疾閯釉~辨析。根據(jù)下文中的“we checked our tires and made sure our lights had batteries”可推知, 作者和父親在做準(zhǔn)備工作, 包括檢查輪胎以及電池等。故選d。6. a. excitedb. nervousc. ann
19、oyedd. exhausted 【解析】選b??疾樾稳菰~辨析。根據(jù)下文中的“as it was absolutely black inside”以及“i was pretty scared”可知, 作者在黑暗中感到很緊張。故選b。7. a. silentb. relaxedc. cautiousd. positive【解析】選c??疾樾稳菰~辨析。根據(jù)下文中的“keep my light on”可知, 父親讓作者保持謹(jǐn)慎, 一直開著手電筒。故選c。 8. a. approachedb. observedc. constructedd. entered【解析】選d??疾閯釉~辨析。根據(jù)下文中的“t
20、he sound of our bikes was heard through the darkness”可推知, 作者和父親已經(jīng)進(jìn)入隧道。故選d。9. a. coveredb. buriedc. absorbedd. dressed【解析】選a??疾閯釉~辨析。根據(jù)語境可知, 墻上布滿了涂鴉。故選a。10. a. forcedb. watchedc. abusedd. judged 【解析】選b。考查動詞辨析。根據(jù)上文可知, 墻上布滿了涂鴉, 進(jìn)入隧道以后的感覺就像是被監(jiān)視一樣。故選b。11. a. dependingb. survivingc. callingd. focusing【解析】選
21、d??疾閯釉~辨析。根據(jù)下文中的“following dad helped me relax”可知, 作者很害怕, 但專注于跟在父親身后使他感到放松。故選d。12. a. accidentsb. hardshipsc. regulationsd. incidents【解析】選b??疾槊~辨析。根據(jù)下文中的“i remember this trip”可知, 無論經(jīng)歷何種困難, 作者都會想起這次旅行。故選 b。13. a. chestb. tripc. workd. heart【解析】選d??疾槊~辨析。根據(jù)上文中的“he turns on the light of hope in my _”可知,
22、 父親點亮了作者心中的希望之光。故選d。 14. a. courageb. pridec. excitementd. enthusiasm【解析】選a??疾槊~辨析。根據(jù)語境可知, 父親也給了作者勇氣。故選a。15. a. difficultb. distantc. longd. dark【解析】選d。考查形容詞辨析。根據(jù)語境可知, 父親給了作者通過人生中“黑暗隧道”的勇氣。故選d。. 語法填空(2021吉林模擬)閱讀下面短文, 在空白處填入1個適當(dāng)?shù)膯卧~或括號內(nèi)單詞的正確形式。since july 2019, chinas online food-delivery platform elem
23、e 1. _(carry) out a new service of picking up garbage from its users in shanghai. the service comes after 2. _ recently-released regulation on waste management in shanghai. individuals 3. _ throw away their garbage without being sorted out can be fined up to 200 yuan, while companies and 4. _ (organ
24、ize) can face fines up to 50, 000 yuan. the trash takeaway service requires residents to sort 5. _ (they) own garbage before it 6. _ (pick) up by workers from eleme, who will ensure the waste is disposed of in the correct garbage bins. its obvious that this service is 7. _ (convenience) to the old,
25、especially to the disabled customers. 8. _, many netizens on sina weibo dont think eleme is providing a wonderful service, saying it just wants 9. _ (make) money. they think 12 yuan for an order is too much. besides, many more people doubt if these collectors will wash their hands after dealing 10.
26、_ the trash. 【文章大意】這是一篇報道類文章。主要是就上海餓了么在2019年七月公布的回收打包垃圾的話題展開討論和人們的各種反應(yīng)。1. 【解析】has carried??疾閯釉~的時態(tài)。根據(jù)本句的時間狀語since july 2019可知, 用現(xiàn)在完成時, 故答案為has carried。2. 【解析】a??疾楣谠~。regulation是單數(shù)可數(shù)名詞, 故答案為a。3. 【解析】who/that??疾殛P(guān)系代詞。先行詞是individuals指人, 此處缺少定語從句的關(guān)系詞, 且關(guān)系詞在定語從句中作主語, 故答案為who/that。4. 【解析】organizations。考查名詞。根
27、據(jù)and前后是并列關(guān)系, 與companies并列, 需要用名詞復(fù)數(shù), 故答案為organizations。5. 【解析】their??疾榇~。根據(jù)句意可知, 該處代詞和它所修飾的名詞表所屬關(guān)系, 用形容詞性物主代詞。故答案為their。6. 【解析】is picked??疾閯釉~的時態(tài)和語態(tài)。根據(jù)上下文可知, 此處主語和動詞之間是被動關(guān)系, 在句中作謂語, 主語it為單數(shù), 且全文時態(tài)為一般現(xiàn)在時。故答案為is picked。7. 【解析】convenient。考查形容詞。此處需要形容詞作表語, be convenient to對方便。故答案為convenient。8. 【解析】however??疾楦痹~。由空后句中dont think可知網(wǎng)友不贊同這種服務(wù), 因此上下文是明顯的轉(zhuǎn)折關(guān)系。故答案為howev
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