【題目】African Americans ________ about 13% of the population of the United States.

A.account forB.get acrossC.engage inD.contribute to

【答案】A

【解析】

考查動詞短語的詞義辨析。句意：非裔美國人約占美國人口的13%。A. account for （比例）占；B. get across通過；C. engage in從事于；D. contribute to有助于。根據(jù)“about 13% of the population of”約占人口的13%，可知，此處表示非裔美國人占美國人口的比例。故選A項。

練習冊系列答案
相關(guān)習題

科目：高中英語 來源： 題型：

【題目】假定你是李華，你的英國朋友Peter正在北京參與交換項目的學習，期間他想?yún)⒓又袊鴤鹘y(tǒng)文化方面的課程，來信希望你能推薦一個課程。請你回復郵件，內(nèi)容包括：

1. 你的推薦；

2. 課程內(nèi)容；

3. 推薦理由。

注意：1. 詞數(shù)100左右；

2. 可以適當增加細節(jié)，以使行文連貫。

Dear Peter,

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours,

Li Hua

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】Meeting all the ______applied to Earth’s seven other continents, Zealandia is on its way to becoming a new continent.

A.criteriaB.curriculaC.dataD.phenomena

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】 The sixth mass extinction is not a worry for the future. It’s happening now，much faster than previously expected，and it's entirely our fault，according to a study puhlished Mooday.

Humans have already wiped out hundreds of species and pushed many more to the brink of extinction through wildlife trade，pollution，habitat loss and the use of toxic substances. The findings published in the scientific Journal Proceedings of the National Academy of Sciences( PNAS)show that the rate at which species are dying out has accelerated in recent decades.

Gerardo Ceballos González，a professor of ecology at the National Autonomous University of Mexico and one of the authors of the study，said approximately 173 species went extinct between 2001 and 2014. “173 species is 25 times more extinct species than you would expect under the normal extinction rate. ”he told CNN in an email. He and his team found that in the past 100 years，more than 400 vertebrate(脊椎動物的)species went extinct. In the normal course of evolution，such extinctions would have taken up to 10，000 years，they said.

Mass extinctions are just as severe as their name suggests. There have been five mass extinction events in the Earth’s history，each wiping out between 70％and 95％of the species of plants，animals and microorganisms. The most recent，66 million years ago，saw dinosaurs disappear. The past events were caused by catastrophic changes of the environment，including massive volcanic eruptions or collision with an asteroid.

The sixth mass extinction the one happening now—is different：scientists say it’s caused by humans. The researchers also said the current coronavirus(冠狀病毒)crisis shows people’s recklessness(魯莽)towards nature can seriously hurt themselves. Many endangered species are dying in large numbers due to the trade in wild animals and plants.

【1】What does the underlined word“toxic”in Para. 2 mean?

A.PoisonousB.Useful

C.AlternativeD.Environment-friendly


【2】How does the writer convince readers of the seriousness of the mass extinctions?

A.By listing reliable statistics.

B.By imagining a picture of the extinctions.

C.By mentioning some news from CNN.

D.By explaining the history of the extinctions.

【3】What is the purpose of the last paragraph?

A.To tell the difference between the fifth and sixth extinction.

B.To explain the cause of the coronavirus crisis.

C.To warn humans to get rid of their wrong actions.

D.To show the writer’s concern about the endangered species.

【4】What does this article mainly talk about?

A.The changes of the environment do harm to wildlife.

B.The sixth mass extinction is much faster than expected.

C.Mass extinctions are just as severe as their name suggests.

D.The current coronavirus has arisen from the illegal trade.

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】 Food serves as a form of communication in two fundamental ways. Sharing bread or other foods is a common human tradition that can promote unity and trust. Food can also have a specific meaning，and play a significant role in a family or culture's celebrations or traditions. The foods we eat—and when and how we eat them—are often unique to a particular culture or may even differ between rural (農(nóng)村的) and urban areas within one country.

Sharing bread，whether during a special occasion (時刻) or at the family dinner table, is a common symbol of togetherness.Many cultures also celebrate birthdays and marriages with cakes that are cut and shared among the guests. Early forms of cake were simply a kind of bread, so this tradition has its roots in the custom of sharing bread.

Food also plays an important role in many New Year celebrations.In the southern United States，pieces of corn bread represent blocks of gold for prosperity (興旺) in the New Year.In Greece，people share a special cake called vasilopita. A coin is put into the cake，which signifies (預(yù)示) success in the New Year for the person who receives it.

Many cultures have ceremonies to celebrate the birth of a child，and food can play a significant role.In China，when a baby is one month old，families name and welcome their child in a celebration that includes giving redcolored eggs to guests.In many cultures，round foods such as grapes，bread，and moon cakes are eaten at welcome celebrations to represent family unity.

Nutrition is necessary for life，so it is not surprising that food is such an important part of different cultures around the world.

【1】According to the passage,sharing bread____

A.can help to develop unityB.is a custom unique to rural areas

C.indicates a lack of foodD.has its roots in birthday celebrations

【2】What is the passage mainly about?

A.The custom of sharing food.B.The importance of food in culture.

C.The role of food in ceremonies.D.The specific meaning of food.

【3】The author explains the role of food in celebrations by

A.making comparisonsB.using examples

C.analyzing causesD.describing processes

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】As students, we must ________ on our studies and work hard instead of fooling around.

A.investigateB.memoriesC.approachD.concentrate

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】—I wonder whether Helen will be here by five.

—Her mother said she left home at half past four. She ________ be here at ten past five.

A.dareB.shouldC.shallD.need

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】—I’ve been promoted to the director of HR and I’m wondering whether I can ask for a big pay rise .

—________. After all, the economy is struggling these days.

A.You can make it.B.Good for youC.You’ve gone too farD.It’s up to you

查看答案和解析>>

科目：高中英語 來源： 題型：

【題目】假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處。每處錯誤僅涉及一個單詞的增加、刪除或修改。

增加：在缺詞處加一個漏字符號（∧），并在其下面寫出該加的詞。

刪除：把多余的詞用斜線（\）劃掉。

修改：在錯的詞下劃一橫線，并在該詞下面寫出修改后的詞。

注意：

1. 每處錯誤及其修改均僅限一詞；

2. 只允許修改10處，多者（從第11處起）不計分.

You may have heard story about old people blackmailing (敲詐) those who offer help to them when they fell over. Therefore, I don’t think it’s often the case. On my way to home yesterday, I was about to cross a street when an old granny walked beside me suddenly fell onto the ground. I was trying to help him when someone said, “Better take a picture of scene first, just in case…” I knew that he meant. But without hesitation, I still helped and stayed with her until her son showed off. Happily, both of them were so gratefully to me.

查看答案和解析>>

同步練習冊答案