【#公共英語等級考試# #2020年全國英語二級閱讀理解強化練習#】鍥而舍之，朽木不折；鍥而不舍，金石可鏤。備考需要這樣持之以恒的精神。©無憂考網(wǎng)為您提供了“2020年全國英語二級閱讀理解強化練習”，歡迎閱讀參考！更多相關訊息請關注©無憂考網(wǎng)！
Passage 1
Over a hundred years ago in 1911,something strange was found in the glaciers of Antarctica.Crilffith Taylor—an Australian geologist,had discovered a blood red stream pouring out of the ice cascades (瀑布) of Talor Glacier!Popularly known as the Blood Falls,scientists had not been able to find the reason behind the blood red liquid flowing through the ice—until recently.The mystery of the Blood Falls had finally been solved.
When these falls were first discovered,scientists had believed that the red colour came from a large amount of red algae (海藻) concentrated in the water.Red algae contain a pigment (色素) which reflects red light,making the algae appear red.
This theory made sense,until it was later found that algae do not play a part in the red color of the flowing liquid at all.What really causes Talor Glacier’s waters appear blood red,is the presence of iron oxide in the liquid.The waters of the Blood Falls are rich in salt and iron content,and when this water comes in contact with the air,it turns red—just like rust!The water in these falls is often referred to as “brine” by scientists because of the high salt content in the water.
This reasoning behind the red colors of the falls was found back in 2003.However,the entire mystery had not yet been solved.How is it then,that the Blood Falls are not frozen?
Researchers at the University of Colorado and University of Alaska found that inside the glacier,there is a network of channels and reservoirs that move the water around.Salt water has a lower freezing temperature.In addition,when any substance undergoes a change in state,it gives off heat.Therefore,the brine actually warm itself up while it’s freezing!How this works,is that when the brine is flowing through the Talor Glacier,some of it does freeze.As a result of changing state from liquid to ice,the brine gives off heat.This heat is enough to keep the rest of the brine in liquid form,which is why it flows out of the glacier.
Incredible new chemistry facts found,and mystery solved!
1.According to the text,the red algae theory was once considered .
A.ridiculous B.reasonable
C.impractical D.complex
2.Why do the Blood Falls look red in colour?
A.Because there is too much salt and iron in the water.
B.Because the liquid is rich in red algae.
C.Because the flowing liquid reflects red sunlight
D.Because the air is thin and rare in Antarctica.
3.What is the main reason for the Blood Falls’ not freezing?
A.The water continued flowing constantly.
B.There is too much salt in the water.
C.The brine gives off heat while freezing
D.Temperatures aren’t high enough for flowing water.
4.What is the passage mainly about?
A.The discovery of the blood glacier.
B.The birth of the Talor Glacier.
C.The flowing red water in Antarctica.
D.The mystery of the Blood Falls.
Passage 2
Growing up in one of the poorest communities with most crimes in Los Angeles,US,being raised by a poorly-educated single mother and attending the worst-quality public school,not many people expected much of me,so I chose to expect something of myself.
On my 12th birthday,I bought a poster of Harvard University to hang in my room.Being at Harvard became my dream—I saw myself attending class in Sanders Theater,studying in Widener Library and eating in Annenberg Hall.Driven by this dream,I kept studying hard.I’d begin my day by asking myself these two questions—What do I want in my life?Are the things I am doing today going to get me closer to that life?
Asking myself the questions gave me the courage to ask over 50 Harvard students for advice on my application essays,it gave me the energy to study just one more hour on my SATs when others were asleep,and it gave me the determination to apply for just one more scholarship when already refused many times.Moreover,reminding myself of my goal each day made it easy to say no to the same choices my friends made,because they would never get me closer to my goal.I found that even being poor could not take away my power to decide what I chose to do with my life.
Every day I could feel myself getting closer and closer to my goal as my writing got better,my SAT score increased,and my scholarship offers started coming in.On March 31st,2011,an email arrived from Harvard.The first word was“Congratulations!”.Tears of joy filled my eyes.Who you are today is the result of the decisions you made yesterday,and who you will be tomorrow will be the result of the choices you make today.Who do you want to be tomorrow?
1.What does the first paragraph mainly tell us?
A.It describes the author’s early living conditions.
B.It proves that the author once lived an unhappy life.
C.It shows how many people treated the author badly.
D.It shares the author’s dream with readers.
2.What is the author’s attitude to the hardship?
A.Disappointed. B.Positive.
C.Thankful. D.Sorrowful.
3.What did the author want to tell us most?
A.A famous university,a successful life.
B.The earlier you set yourself a goal,the better.
C.What doesn’t kill you makes you stronger.
D.Your choices determine who you are.
Passage 1
【語篇導讀】1911年,澳大利亞地質學家在南極洲的冰川中發(fā)現(xiàn)了一種奇怪的東西——血瀑布。眾所周知,科學家一直無法找到血液中的紅色液體不結冰的原因。直到最近,血瀑布的秘密終于被發(fā)現(xiàn)了。水中富含鹽和鐵,當水接觸空氣時,就會像鐵銹一樣變紅,鹽分很高,導致它不結冰。
1.According to the text,the red algae theory was once considered .
A.ridiculous B.reasonable
C.impractical D.complex
答案 B
解析 推理判斷題。根據(jù)第三段第一句“This theory made sense,until it was later found that algae do not play a part in the red color of the flowing liquid at all.” 可知,這個理論一開始被認為是合理的,但后來發(fā)現(xiàn)海藻對于流動的液體呈紅色不起作用。make sense“有道理,有意義,講的通”,與reasonable同義。
2.Why do the Blood Falls look red in colour?
A.Because there is too much salt and iron in the water.
B.Because the liquid is rich in red algae.
C.Because the flowing liquid reflects red sunlight
D.Because the air is thin and rare in Antarctica.
答案 A
解析 細節(jié)理解題。根據(jù)第三段中的“The waters of the Blood Falls are rich in salt and iron content,and when this water comes in contact with the air,it turns red—just like rust!”可知,是因為水中富含鹽分和鐵,當水接觸空氣時,就會像鐵銹一樣變紅。
3.What is the main reason for the Blood Falls’ not freezing?
A.The water continued flowing constantly.
B.There is too much salt in the water.
C.The brine gives off heat while freezing
D.Temperatures aren’t high enough for flowing water.
答案 C
解析 細節(jié)理解題。根據(jù)第五段中的“As a result of changing state from liquid to ice,the brine gives off heat.This heat is enough to keep the rest of the brine in liquid form,which is why it flows out of the glacier.”可知,當液態(tài)到冰態(tài)變化時,水放出熱量。這種熱量足以使其余的鹽水保持液態(tài),這就是不結冰的原因。
4.What is the passage mainly about?
A.The discovery of the blood glacier.
B.The birth of the Talor Glacier.
C.The flowing red water in Antarctica.
D.The mystery of the Blood Falls.
答案 D
解析 主旨大意題。通讀全文可知,1911年澳大利亞地質學家在南極洲的冰川中發(fā)現(xiàn)了血瀑布。眾所周知,科學家一直無法找到血液中的紅色液體不結冰的原因。直到最近,血瀑布的秘密終于被發(fā)現(xiàn)了。分析選項可知,D項“血瀑布之謎�！狈项}意。
【長難句分析】The waters of the Blood Falls are rich in salt and iron content,and when this water comes in contact with the air,it turns red—just like rust!
血瀑布中的水里含有豐富的鹽和鐵,當這種水與空氣接觸時,就會變成紅色——就像生銹一樣!
本句總體上是一個由and連接的并列句,在第二個分句中有一個when引導的時間狀語從句。
Passage 2
【語篇導讀】作者雖早年生活于一個很差的環(huán)境中,但在12歲時有了一個哈佛夢。從此在這個夢的驅使下,作者一直不斷地努力學習,最終達到了自己的目標。作者要告訴我們的是即使貧窮也無法剝奪我們決定為自己選擇人生的權力——你的選擇決定了你是誰。
1.What does the first paragraph mainly tell us?
A.It describes the author’s early living conditions.
B.It proves that the author once lived an unhappy life.
C.It shows how many people treated the author badly.
D.It shares the author’s dream with readers.
答案 A
解析 段落大意題。根據(jù)第一段的介紹可知,作者描述了自己從小生活的環(huán)境,即早年的生活狀況,因此通過分析可知A項符合題意。
2.What is the author’s attitude to the hardship?
A.Disappointed. B.Positive.
C.Thankful. D.Sorrowful.
答案 B
解析 推理判斷題。通讀全文可知,作者雖早年生活于一個很差的環(huán)境,在12歲時有了一個哈佛夢。從此在這個夢的驅使下,一直不斷地努力學習,最終達到了自己的目標。所以作者是用一種積極的態(tài)度應對困境。
3.What did the author want to tell us most?
A.A famous university,a successful life.
B.The earlier you set yourself a goal,the better.
C.What doesn’t kill you makes you stronger.
D.Your choices determine who you are.
答案 D
解析 主旨大意題。根據(jù)最后一段中的 “Who you are today is the result of the decisions you made yesterday,and who you will be tomorrow will be the result of the choices you make today.”(你今天是誰,是你昨天做出的決定的結果,明天你將是誰,這將是你今天做出的選擇的結果。)可知D項“你的選擇決定了你是誰�！笔谴鸢�。
