After almost 30 years of arguing that a black hole swallows up everything that falls into it, British astrophysicist Stephen Hawking moved backward last week. The world-famous writer of "Brief History of Time" said he and other scientists had got it wrong. "I've been thinking about this problem for the last 30 years, and I think I now have the answer to it," said Hawking. "A black hole only appears to form but later opens up and set free information about what fell inside. So we can be sure of the past and can predict the future." The findings could help solve the "black hole information paradox ", an important puzzle in modern physics. A black hole is an area in space where matter is under such pressure that even light can not escape from its gravitational pull . But, exactly what happens there has long puzzled scientists. Black holes occur when a powerful star burns up its nuclear fuel and gravity forces it to break down in on itself. The great weight of the star's outer layers moves in towards its center. The force of gravity keeps nearly all light from escaping and nothing inside can be seen from the outside. The star actually disappears from the universe into a point of infinite density . That is a place where the laws of general relativity that govern space and time break down. Hawking has devoted most of his life to studying these questions. At the beginning, _ believed the holes were like a "universal vacuum cleaner", sucking up everything in their path. Hawking revolutionized the study of black holes when he proved, in 1976 that, under the strange rules of quantum physics , when black holes form they send out energy and lose mass in the process. In thinking up this so-called "Hawking radiation", the prefix = st1 /Cambridgemathematician also created one of the biggest puzzles in physics. These particles , he said, contained no information about what has been occurring inside the black hole, or how it formed. Under his theory, once the black hole disappears, all the information within it is lost. What would be the best title for the passage? A) The Formation of the Black Hole B) Black Hole Information Paradox C) Black Hole Mystery D) The Cause of the Black Hole
C
One evening in November, Berlin received a telephone call from Mrs. Green. "Please, Dr Berlin, come to my house. I had 50,000 dollars on my desk and now it is gone." Dr Berlin arrived at Mrs. Green's house at eight o'clock. First he asked Mrs. Green, "When did you see the money last?" "At seven o'clock. I put it on my desk in my living room. Then I went to wash my hair. I came back at seven thirty and the money was gone." "I see." Dr Berlin said. "Were you alone in the house?" "No. My sister's son Jack is here, too." Then Dr Berlin and Mrs. Green went to Jack's room. "Please, sit down," Jack said. Dr Berlin sat on the only chair in the room, and the chair was cold. He also saw some books on the ground near his feet. "What have you been doing this evening?" Dr Berlin asked. "I came home at six-thirty, and went right to my room. I've been sitting in that chair and reading all the evening. I never got up and I never left the room. Maybe somebody came into the house and took my aunt's money." After hearing that, Dr Berlin was clear about who had taken the money. Where did Mrs. Green put her money? A) In her living room. B) In her washing room. C) In Jack's room. D) In her office.
A
Q: My son was a second-grader. He went to school by bus every day. He was the first student on in the morning, as we were farthest from school, and the last student off in the evening. I was a teacher myself and it was a comfort to realize the school staff were all working as hard as I was to provide a safe learning environment. One day I came home from work and waited for my son to get home for a long time. Then I called the school. "Perhaps he's just a bit late," said the secretary. "I will call the driver to see if those children are home." A few minutes later, I answered the phone to hear that the other students were home. Then I called his friends' parents, to see if perhaps he had gotten off at their stop to play. The answers were all "No." By that time, it was dark and I was scared. My home was in the mountain areas, and it was said that a wolf had come up somewhere. My husband wasn't at home, so I forced myself to calm down and decided to go out to look for him. I was about to go out when the telephone rang; it was from the driver. "He's okay," I heard. "He was asleep on the seats in the back, under a couple of jackets. Since it's dark, can he spend the night with my family?" I was relieved and agreed. Since my son had a great adventure, the school started giving a copy of the list to the driver, so he could check off the children's names when they got off the bus. I think highly of the school for taking the cautionary step ahead; it is a sign of their concern for students, parents, and staff. At first the secretary thought _ . A) the author's son was still at school B) the school bus would arrive in a while C) the author's son was at his friend's home D) there might be something wrong with the school bus
A: B
(Q).
Recently I came in contact with the true meaning of love. That would have been, Kane, a boy. Kane was the two-year-old son of Jolene, my new neighbor. At a glance Kane was a sight. He'd been born with hard sticks for legs. And on that morning I witnessed the effect that Kane's physical shortcomings had on his family. But I also witnessed much more than that. I saw an extraordinary family that embraced this special child. A family that wouldn't allow Kane to know he was different. Jolene had constructed a small cart just a few inches off the floor for his son to get around. Using his hands to move about, Kane moved the cart to "go to" any place just as everyone else was able to do. Kane worked that little cart like a master. Kane was a vital focus of the entire family. He was more than just a member of the family; he was the soul. This child was the driver, the motivator, and the founder of much of the interaction. Much later in my life, I came to realize that God had sent this child to help some of us who just weren't getting what love was all about. Even with my limited capacity for understanding at the time that Kane was a highly developed spirit with great wisdom. Kane demanded attention, but not because of his mobility challenges or other apparent shortcomings. In his mind, he had no challenges or shortcomings. The truth is that he received attention because he was alive and real and had so much to offer. Kane was and still is a lot of warm and powerful energy sent to us all, so we might learn that love surpasses all things. Kane, a fragile yet lovely baby, was here to teach us all an important lesson. And at the age of two he did just that. According to the author, God made Kane with disability to help _ . A) his parents get to know their responsibility B) his family members know the importance of union C) people especially the healthy realize what love really means D) people especially the disabled realize their inner power
(A).
C