日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

They are sisters, but they have nothing _______.

A. in hand　　　 　　　 B. in common　　 C. in public 　　　　D. in need

They are sisters, but they have nothing _____.

A. in hand 　 B. in common　 C. in public 　 D. in need

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 (物體) 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 (傳感器). 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 (減), multiplying, and dividing, their brains seem to be preparing for a time when they finally will.

1.Why were hats with sensors used in the study?

2.What does the underlined word “They” in the third paragraph refer to?

3.Which part of the brain is responsible for responding to the changes of numbers?

4.The last paragraph mainly implies that           .

5.The purpose of the study is to prove that          .

Why do men die earlier than women? The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.

The largest study of the effects of ageing on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.

“We have found that the power of the male heart falls by 20-25 percent between 18 and 70 years of age,” said the head of the study, David Goldspink of Liverpool John Moores University in the UK.

“Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men,” said Goldspink. “This is part of the ageing process.”

What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.

“This gender difference might just explain why women live longer than men,” said Goldspink. They studied more than 250 healthy men and women between the ages of 18 and 80, focusing on healthy persons to remove the confusing influence of disease. “The team has yet to find why ageing takes a greater loss on the male heart,” said Goldspink.

The good news is that men can improve the health of their heart with regular exercise. Goldspink stressed that women also need regular exercise to prevent their leg muscles becoming smaller and weaker as they age.

The underlined word “longevity” in the second paragraph probably refers to “________”.

A. health     B. long life   C. ageing    D. effect

The text mainly talks about ________.

A. men’s heart cells

B. women’s ageing process、

C. the gender difference

D. hearts and long life

According to the text, the UK scientists have known that ________.

A. women have more cells than men when they are born

B. women can replace the cells that enable the heart to beat

C. the female heart loses few of the cells with age

D. women never lose their pumping power with age

If you want to live longer, you should ________.

A. enable your heart to beat much faster

B. find out the reason for ageing

C. exercise regularly to keep your heart healthy

D. prevent your cells from being lost

We can know from the passage that ________.

A. the reason why ageing takes a greater loss on the male heart has been found out

B. scientists are on the way to finding out why the male heart loses more of the cells

C. the team has done something to prevent the male from suffering the greater loss

D. women over 70 could lose more heart cells than those at the age of 20

A few years ago, Paul Gerner began to gather a group of architects in Las Vegas to ask them what it would take to design a public school that used 50 percent less energy, cost much less to build and obviously improved student learning. “I think half of them fell off their chairs,” Gerner says.
Gerner manages school facilities（設施）for Clark County, Nevada, a district roughly the size of Massachusetts. By 2018, 143,000 additional students will enter the already crowded public-education system. Gerner needs 73 new schools to house them. Four architecture teams have nearly finished designing primary school prototypes（樣品）; they plan to construct their schools starting in 2009. The district will then assess how well the schools perform, and three winners will copy those designs in 50 to 70 new buildings.
Green schools are appearing all over, but in Clark County, which stands out for its vastness, such aggressive targets are difficult because design requirements like more natural light for students go against the realities of a desert climate. “One of the biggest challenges is getting the right site orientation（朝向）,” Mark McGinty, a director at SH Architecture, says. His firm recently completed a high school in Las Vegas. “You have the same building, same set of windows, but if its orientation is incorrect and it faces the sun, it will be really expensive to cool.”
Surprisingly, the man responsible for one of the most progressive green-design competition has doubts about ideas of eco-friendly buildings. “I don’t believe in the new green religion,” Gerner says. “Some of the building technologies that you get are impractical. I’m interested in those that work.” But he wouldn’t mind if some green features inspire students. He says he hopes to set up green energy systems that allow them to learn about the process of harvesting wind and solar power. “You never know what’s going to start the interest of a child to study math and science,” he says.
45. How did the architects react to Gerner’s design requirements?
A. They lost balance in excitement.                  B. They showed strong disbelief.
C. They expressed little interest.                       D. They burst into cheers.
46. Which order of steps is followed in carrying out the project?
A. Assessment — Prototype — Design — Construction.
B. Assessment — Design — Prototype — Construction.
C. Design — Assessment — Prototype — Construction.
D. Design — Prototype — Assessment — Construction.
47. What makes it difficult to build green schools in Clark County?
A. The large size.                                           B. Limited facilities.
C. The desert climate.                                      D. Poor natural resources.
48. What does Gerner think of the ideas of green schools?
A. They are questionable.                                 B. They are out of date.
C. They are advanced.                                      D. They are practical.