相關習題
 0  147817  147825  147831  147835  147841  147843  147847  147853  147855  147861  147867  147871  147873  147877  147883  147885  147891  147895  147897  147901  147903  147907  147909  147911  147912  147913  147915  147916  147917  147919  147921  147925  147927  147931  147933  147937  147943  147945  147951  147955  147957  147961  147967  147973  147975  147981  147985  147987  147993  147997  148003  148011  151629 

科目: 來源: 題型:

【題目】 Natural selection is the process by which one type of animal within a species thrives because of certain characteristics that make it more likely to live than others in its group. The history of the peppered moth(灰蛾)is an example of the natural selection process.

In 19th century England, certain types of peppered moths were able to better blend(融合)into their surroundings. During that time period, great changes were happening in Great Britain. The Industrial Revolution was part of this change, and with it came air pollution. Natural selection often takes hundred or even thousands of years to occur. For the peppered moth, this process occurred comparatively quickly.

At the beginning of the Industrial Age, most peppered moths in England were light-colored and covered with black markings, although a few moths had dark-colored wings. Because the light-colored moths blended into the light-colored bark on the trees, they could not be easily seen by birds that would eat them. As the air grew more polluted, however, tree trunks became covered with soot(煙煤)and became darker. The light-colored moths became easy for birds to see against the dark tree trunks. Since the dark-colored moths now had the advantage, their numbers grew. Within 50 years, the peppered moth went from being mostly light-colored to being mostly dark-colored.

In the 20th century, the air cleared up, and the peppered moth population changed again. As tree trunks lighted due to less soot in the air, light-colored moths once again had an advantage. Their numbers increased as soot levels declined. Depending on their environment, the coloration of the moths helped them to be “naturally selected” to survive.

1In 19th century, what was one of the causes of great changes in Great Britain?

A.The surroundings.B.The Industrial Revolution.

C.The natural selection.D.The peppered moth.

2What can we infer about the peppered moth’s natural selection process?

A.The length of time was unusual.

B.The soot levels in England did not affect it.

C.The color of peppered moths changed at random.

D.It was a good example of environmental protection.

3What’s the difference between light-colored and dark-colored moths?

A.Dark-colored moths were originally easy to see on trees.

B.Both kinds of moths preferred the dark-colored trees.

C.Birds failed to see light-colored moths.

D.The color of moths was unimportant.

4Which would most likely happen if soot darkened England’s trees again?

A.Birds would eat fewer moths.

B.Moths would not be able to stay alive.

C.Light-colored moths would disturb people’s life.

D.The population of dark-colored moths would increase.

查看答案和解析>>

科目: 來源: 題型:

【題目】Matilda

By Roald Dahl

Price: $ 10.25

Gifted and sweet, Matilda White goes largely unnoticed by her less-than-loving parents. Things only get worse when she goes to school. Luckily, her teacher, Miss Honey, helps Matilda discover how special she is and encourages her to create the life she dreams about.

Ivy & Bean

By Annie Barrows

Price: $4.59

When Ivy moves in across the street, Bean is sure they won’t be friends. They are just too different. However, when Ivy helps Bean get away from her sister, who is trying to get Bean in trouble, a friendship blossoms between the unlikely pair. Kids who enjoy this book can read the whole series over the summer.

Ordinary Mary’s Extraordinary Deed

By Emily Pearson

Price: $ 7.99

When Mary decides to give some fresh-picked wild blueberries to a neighbor, she starts a chain reaction of kindness. After Mrs. Bishop makes and shares newly-made cake, her recipients go on to spread kindness to others they meet. Mary might be a common little girl, but she learns that even children can help make the world a better place.

Frederick

By Leo Lionni

Price: $ 14.39

Frederick is a mouse who lives with his family in a large field. During the summer, all of the mice begin to store food to prepare for the cold winter months. All of the mice except Frederick, that is. Instead, Frederick collects things such as rays of sun, rainbows and words. Although the others think he is stupid, they come to learn that everyone’s contribution counts.

1Who helps Matilda discover how special she is?

A.Her friend, Annie.B.Her neighbor, Mary.

C.Her father, Mr. White.D.Her teacher, Miss Honey.

2Whose book is mainly about friendship?

A.Roald Dahl’s.B.Leo Lionni’s.

C.Emily Pearson’s.D.Annie Barrows’s.

3What does Mary decide to give to her neighbor ?

A.Cakes.B.Blueberries.

C.Books.D.Flowers.

4How much should you pay for a book of animals?

A.$4.59.B.$7.99.

C.$14.39.D.$10.25.

5Where is the text most likely to have been taken from?

A.A story book.B.A lesson plan.

C.A book review.D.A kid’s magazine.

查看答案和解析>>

科目: 來源: 題型:

【題目】The new machine, according to the report, will work twice as fast, ______ greatly reducing costs.

A.soB.evenC.yetD.thus

查看答案和解析>>

科目: 來源: 題型:

【題目】It’s so nice to hear from her again. ______, we last met more than thirty years ago.

A.What’s moreB.That’s to sayC.In other wordsD.Believe it or not

查看答案和解析>>

科目: 來源: 題型:

【題目】The girl devoted all her spare time she had ______ others.

A.to helpB.helpedC.to helpingD.help

查看答案和解析>>

科目: 來源: 題型:

【題目】— The buyer ______ me 50 yuan for MP4. Shall I sell it?

— Why not? Your MP4 is out of date and it isn’t worth so much.

A.providedB.offeredC.chargedD.supplied

查看答案和解析>>

科目: 來源: 題型:

【題目】假如你是學生李華,你的好友Peter對中國傳統(tǒng)文化感興趣,請給他寫封信,邀請他本周六早上和你一起去公園學習打太極拳,內容包括:

1.時間、地點、交通方式;

2.簡介太極拳(如它的好處)

注意:1.詞數(shù)100左右;

2.可適當增加細節(jié),以使行文連貫。

_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

查看答案和解析>>

科目: 來源: 題型:

【題目】請閱讀下面文字, 并按照要求用英語寫一篇150詞左右的文章。

This week should have seen the beginning of a new semester. Instead, China has been witnessing a different kind of new semester because of the novel coronavirus outbreak. Many Chinese schools have suspended the new semester and moved the classrooms online, leading to an explosion of viewings on online educational platforms,

On the first day of school, DingTalk, a virtual workplace developed by Alibaba Group, held online classes for an estimated 50 million students nationwide, from primary to high school level.

The huge demand led many to assume that online classrooms are the source of future prosperity. But according to a guideline issued by the Ministry of Education on Feb 12, “postponement of school without suspension of learning” is not equal to learning through online courses. As the education authorities have said, it is unnecessary for every teacher to record online courses to be evaluated for quality. Also, kindergarten classes cannot be held online.

(寫作內容)

1.用約30個單詞概述上述信息的主要內容;

2.120個單詞發(fā)表你的觀點, 內容包括:

(1) 網(wǎng)絡直播課是否會取代傳統(tǒng)課堂。

(2) 2-3個理由或論據(jù)支撐你的觀點。

(寫作要求)

1. 闡述觀點或提供論據(jù)時, 不能直接引用原文語句;

2. 作文中不能出現(xiàn)真實姓名和學校名稱;

3. 不必寫標題。

(評分標準)

內容完整, 語言規(guī)范, 語篇連貫, 詞數(shù)適當。

_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

查看答案和解析>>

科目: 來源: 題型:

【題目】閱讀下面短文,在空白處填入1個適當?shù)膯卧~或括號內單詞的正確形式。

Cyber Monday is a shopping holiday which falls on the Monday following Thanksgiving. It is a day on 1 retailers (零售商) often give huge discounts to online shoppers. As a result, tens of millions of shoppers shop on this day 2 (get) the best gift for holiday shopping season. Although it 3 (consider) as a strict American holiday at first, it has since spread all over the world.

A current belief is that Cyber Monday is leading 4 the decline of Black Friday as more and more 5 (consumer) decide to do their shopping online. This is either due to 6 (convenient) or the lower prices of goods purchased online.

Cyber Monday is not 7 public holiday. So it isn’t observed in the U.S on either the state or federal level, which means that all businesses that are 8 (normal) open on this day are open as usual.

Unfortunately, some of the online shoppers spend lots of time 9 (look) for bargains during working time on Cyber Monday. Some employees were even fired because they used their companies’ Internet for non-work related activities. After all, it isn’t 10 (suit) to do shopping online during working time.

查看答案和解析>>

科目: 來源: 題型:

【題目】The company can choose the right product to produce, _______ expected to be most popular with consumers.

A.one thatB.whichC.itD.the one

查看答案和解析>>

同步練習冊答案