C

If you gaze（凝视）through a telescope at a distant galaxy（星系）, it may glow brightly with the light of hundreds of millions of stars. Despite（尽管，不顾） all that light, most scientists think that at the center of a big galaxy lies something very dark: a black hole. A black hole is a region of space with gravity so strong that nothing can escape, not even light.

Astronomers recently announced they had observed a faraway galaxy that may have at its center two black holes, very close together. Based on their observations, the stargazers suspect one of the black holes has more mass than the other. The more mass something has, the stronger its gravitational force, so a larger black hole has a stronger gravitational attraction. The smaller black hole orbits（作轨道运行） the larger black hole, just as the earth orbits the sun.

The biggest galaxies in the universe form when two smaller galaxies collide（碰撞）. If  two galaxies merge（合并）, then all of their stars start orbiting a common center. The black holes at the galaxies’ centers should come together, too. Galaxies are colliding all the time, so we should be able to find lots of black hole pairs. But that’s easier said than done—astronomers rarely find these in deep space.

To find a black hole is complicated. A black hole doesn’t produce any light, so how can you find one in space? Astronomers think when something (like dust) falls into a giant black hole, a jet of radiation, a form of energy, may stream away. If this radiation is strong enough, it forms a quasar（类星体）.

The Arizona astronomers looked at more than 17,000 quasars and finally found a galaxy that may have a double black hole at its heart. Though the finding of their research is still unconfirmed, and they may be mistaken, the truth will be revealed in the future.

63. Which of the following is TRUE about black holes?

A. A black hole is a region in galaxies with nothing in it, even a bunch of light.

B. Black holes are used by astronomers to study how quasars come into being.

C. When different galaxies meet in space, the black holes become bigger and bigger

D. Some scientists think there’s one black hole in a galaxy, but others think there’re two.

64. From the second paragraph we can infer that ________.

A. a larger black hole pushes a smaller black hole away

B. a larger black hole pulls a smaller black hole toward it

C. the places of black holes are fixed, so we can see them clearly

D. a smaller black hole moves around a larger one because of radiation

65. According to the passage, astronomers think that there should be many black hole pairs because____________.

A. a black hole can produce light

B. black holes can attract one another

C. different black hole pairs come into being with the meeting of galaxies.

D. a big black hole can usually be divided into two small black holes

If you gaze（凝视）through a telescope at a distant galaxy（星系）, it may glow brightly with the light of hundreds of millions of stars. Despite（尽管，不顾） all that light, most scientists think that at the center of a big galaxy lies something very dark: a black hole. A black hole is a region of space with gravity so strong that nothing can escape, not even light.

Astronomers recently announced they had observed a faraway galaxy that may have at its center two black holes, very close together. Based on their observations, the stargazers suspect one of the black holes has more mass than the other. The more mass something has, the stronger its gravitational force, so a larger black hole has a stronger gravitational attraction. The smaller black hole orbits（作轨道运行） the larger black hole, just as the earth orbits the sun.

The biggest galaxies in the universe form when two smaller galaxies collide（碰撞）. If  two galaxies merge（合并）, then all of their stars start orbiting a common center. The black holes at the galaxies’ centers should come together, too. Galaxies are colliding all the time, so we should be able to find lots of black hole pairs. But that’s easier said than done—astronomers rarely find these in deep space.

To find a black hole is complicated. A black hole doesn’t produce any light, so how can you find one in space? Astronomers think when something (like dust) falls into a giant black hole, a jet of radiation, a form of energy, may stream away. If this radiation is strong enough, it forms a quasar（类星体）.

The Arizona astronomers looked at more than 17,000 quasars and finally found a galaxy that may have a double black hole at its heart. Though the finding of their research is still unconfirmed, and they may be mistaken, the truth will be revealed in the future.

63. Which of the following is TRUE about black holes?

A. A black hole is a region in galaxies with nothing in it, even a bunch of light.

B. Black holes are used by astronomers to study how quasars come into being.

C. When different galaxies meet in space, the black holes become bigger and bigger

D. Some scientists think there’s one black hole in a galaxy, but others think there’re two.

64. From the second paragraph we can infer that ________.

A. a larger black hole pushes a smaller black hole away

B. a larger black hole pulls a smaller black hole toward it

C. the places of black holes are fixed, so we can see them clearly

D. a smaller black hole moves around a larger one because of radiation

65. According to the passage, astronomers think that there should be many black hole pairs because____________.

A. a black hole can produce light

B. black holes can attract one another

C. different black hole pairs come into being with the meeting of galaxies.

D. a big black hole can usually be divided into two small black holes

The baby is just one day old and has not yet left hospital. She is quiet but alert (警觉). Twenty centimeters from her face researchers have placed a white card with two black spots on it. She stares at it carefully. A researcher removes the card and replaces it by another, this time with the spots differently spaced. As the cards change from one to the other, her gaze(凝视) starts to lose its focus - until a third, with three black spots, is presented. Her gaze returns; she looks at it for twice as long as she did at the previous card. Can she tell that the number two is different from three, just 24 hours after coming into the world?
Or do newborns simply prefer more to fewer? The same experiment, but with three spots shown before two, shows the same return of interest when the number of spots changes. Perhaps it is just the newness? When slightly older babies were shown cards with pictures of objects(a comb, a key, an orange and so on), changing the number of objects had an effect separate from changing the objects themselves. Could it be the pattern that two things make, as opposed to three? No again. Babies paid more attention to squares moving randomly on a screen when their number changed from two to three, or three to two. The effect even crosses between senses. Babies who were repeatedly shown two spots became more excited when they then heard three drumbeats than when they heard just two; likewise(同样地) when the researchers started with drumbeats and moved to spots.
【小题1】The experiment described in Paragraph 1 is related to the baby’s ______.

Many years ago when the world was a simpler place there lived a shoemaker. He used __16__ silk and soft leather(皮革) to make the greatest shoes. Colorful shoes lined the shelves of his store.

One little girl, Rachel, often looked through the _17__ into the store. One day while Rachel was looking again, the shoemaker __18__ at her side. “Well, dear, which shoes would you take?” he said, smiling.

Rachel was __19__ as she hadn’t noticed the little man. “Oh! I …I was just __20__,” Rachel said. “I can’t afford them and I would never take anything that doesn't belong to me.”

The shoemaker said, “I meant to give you a pair as a(n) __21__ .” Rachel stared at the shoemaker. A small pointed(尖尖的) ear could be seen underneath(在…底下) his hat. The guy __22__ Rachel’s curious gaze(凝视) and fixed his hat tightly over his ear _23__.

“Why don't you wear a pair of your own beautiful shoes?” Rachel questioned him, smiling.

“I am always working and have no need of __24__ shoes,” he explained.

Rachel’s smile __25__. “I have no need of good shoes either,” Rachel said in a sad voice and limped (一瘸一拐地走) away.

A few days later, Rachel was walking past the shoe shop when the shoemaker waved her into the shop. Looking around, Rachel said, “You have every color of the rainbow here.”

The shoemaker said, “They are the colors of the rainbow, Rachel.” __26__ a drawer(抽屉), he took out the most beautiful pair of shoes Rachel had ever seen. The shoemaker placed the shoes onto her feet. “Take a __27__, Rachel,” he said.

“I …I can’t,” Rachel said with a tear.

“Yes, Rachel, you can,” the shoemaker __28__.

Rachel stood up staight. Deliberately(小心翼翼地) she took a __29__, followed by another and another. “I can do it. I can do it,” she said, walking easily across the floor, not limping at all.

The shoemaker laughed __30__ and said, “I told you they were magic shoes…”

The baby is just one day old and has not yet left hospital. She is quiet but alert (警觉). Twenty centimeters from her face researchers have placed a white card with two black spots on it. She stares at it carefully. A researcher removes the card and replaces it by another, this time with the spots differently spaced. As the cards change from one to the other, her gaze(凝视) starts to lose its focus - until a third, with three black spots, is presented. Her gaze returns; she looks at it for twice as long as she did at the previous card. Can she tell that the number two is different from three, just 24 hours after coming into the world?

Or do newborns simply prefer more to fewer? The same experiment, but with three spots shown before two, shows the same return of interest when the number of spots changes. Perhaps it is just the newness? When slightly older babies were shown cards with pictures of objects(a comb, a key, an orange and so on), changing the number of objects had an effect separate from changing the objects themselves. Could it be the pattern that two things make, as opposed to three? No again. Babies paid more attention to squares moving randomly on a screen when their number changed from two to three, or three to two. The effect even crosses between senses. Babies who were repeatedly shown two spots became more excited when they then heard three drumbeats than when they heard just two; likewise(同样地) when the researchers started with drumbeats and moved to spots.

1.The experiment described in Paragraph 1 is related to the baby’s ______.

A．sense of hearing.

B．sense of sight.

C．sense of touch.

D．sense of smell.

2.Babies are sensitive to the change in ______.

A．the size of cards.

B．the colour of pictures.

C．the shape of patterns.

D．the number of objects.

3.Why did the researchers test the babies with drumbeats?

A．To reduce the difficulty of the experiment.

B．To see how babies recognize sounds.

C．To carry their experiment further.

D．To keep the babies’ interest.

4.Where does this text probably come from?

A．Science fiction.

B．Children’s literature.

C．An advertisement.

D．A science report.