题目内容
for a time.It may do harm to go on talking about it.
A.Put it away B.Break it down C.Call it up D.Leave it alone
D
It takes years of school to develop math skills, but learning about numbers starts earlier than you might think. Now according to a new study, at three months, babies have already started acquiring a concept (概念) of “how much”.
Previous research had suggested that very young babies can tell when the number of objects (物体) in a group has changed. But the babies in these studies were simply reacting generally to the fact that something had changed, they suspected.
Researchers of Harvard University studied 36 babies, all three months old. During the tests, each baby wore a hat with sensors (传感器). The babies watched a series of images on a computer screen. They showed the same object, such as a cartoon character. For a while, the number of the objects in the pictures didn’t change. Then the images began to display a different object, or a different number of one of the objects the babies had previously looked at. As soon as something changed, the babies’ brains responded with a specific pattern of electrical signals, which would be recorded by sensors.
By analyzing these signals, the researchers discovered that one part of the brain (near the top on the left side) responded when the object in the image changed. A different part of the brain (lower and on the right side) responded when the number of objects in the image changed. This was not the area of the brain that is involved in attention. That suggests that the babies’ brains are doing more than just reacting to a change in what they’re seeing – they actually seem to be able to tell number changes from other types of changes.
Numbers and amounts are important concepts in our lives. Even though babies are years away from adding, subtracting (减), multiplying, and dividing, their brains seem to be preparing for a time when they finally will.
【小题1】Why were hats with sensors used in the study?
A.To record the images on the computer screen. |
B.To remind babies of the changes of numbers. |
C.To record the electrical activity of each baby’s brain. |
D.To help babies concentrate on the computer screen. |
A.Babies involved in the study. |
B.Sensors worn by the babies. |
C.Numbers marked on the objects. |
D.Images shown on the computer screen. |
A.The top. |
B.The left side. |
C.The lower and the right side. |
D.The upper and the left side. |
A.babies are in fact cleverer than they are thought |
B.it is impossible to understand human brain completely |
C.numbers play the most important part in people’s lives |
D.the ability of babies remain a mystery to scientists |
A.math skills should be developed as early as possible |
B.numbers are easier for babies to judge than images |
C.babies really do have some sense of numbers |
D.babies can react differently to what they see |
Alice Walker makes her living by writing, and her poems, short stories, and novels have won many awards and fellowships for her. She was born in Eatonton, Georgia. She went to public schools there, and then to Spelman college in Atlanta before coming to New York to attend Sarah Lawrence college, from which she graduated in 1966. For a time she lived in Jackson, Mississippi, with her lawyer husband and a small daughter. About Langston Hughes, American Poet, here first book for children, she says, “After my first meeting with Langston Hughes I vowed I would write a book about him for children someday. Why? Because I, at 22, knew next to nothing of his work , and he didn’t scold me; he just gave me a stack of his books. And he was kind to me; I will always be grateful that in his absolute warmth and generosity he fulfilled my deepest dream ( and need) of what a poet should be.?”
“To me he is not dead at all. Hardly a day goes by that I don’t think of him or speak of him. Once, just before he died, when he was sick with the flu, I took him a sack full of oranges. The joy I felt in giving that simple gift is undiminished by time. He said he liked oranges, too.”
1.What is the main topic of the passage?
A.Alice Walker’s reflection on Langston Hughes. |
B.The influence of Alice Walker on the writing of Langston Hughes. |
C.Langston Hughes’ book about Alice Walker. |
D.A comparison of the childhoods of Alice Walker and Langston Hughes. |
2.In the passage, Alice Walker is described as _____.
A.a research fellow at Spelman College |
B.a professor at Sarah Lawrence College |
C.a prize-winning writer of prose and poetry |
D.an author of plays for children |
3.Before attending college, Alice Walker went to school in _____.
A.Atlanta, Georgia |
B.Eatonton, Georgia |
C.Jackson, Mississippi |
D.Lawrence, Massachusetts |
4.The word “vowed” the first paragraph is closest in meaning to _____.
A.shouted |
B.believed |
C.refused |
D.promised |
5.It can be inferred from the passage that Alice Walker was 22 years old when _____.
A.she moved to Jackson, Mississippi |
B.she moved to New York |
C.she first met Langston Hughes |
D.Langston Hughes died |