Strange things happen when you travel, because the earth is divided into twenty-four zones. The time difference between two zones is one hour. You can have days with more than twenty-four hours and days with fewer than twenty- four hours. You can have weeks with more than seven days and weeks with fewer than seven days. If you make a five-trip across the Atlantic Ocean , your ship come into a different time zone every day. As you come into each zone, the time changes one hour. If you travel west, you set your watch back. If you travel east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours. If you make a trip by ship across the Pacific Ocean , you cross the International Date Line. This is the point where a new day begins when you cross the line, you change one full day. If you travel east, today becomes yesterday, if you travel west it is tomorrow. If we travel east across the International Date Line on July 5th, the date becomes July _ . A) 3rd B) 4th C) 5th D) 6th
B
Spending just a few hours a week online may make people feel more socially isolated , lonely and downhearted , according to a two-year study of nearly 100 families with the Internet. "We were surprised to find that social technology has such bad effects on social communications," the lead author, Dr. Robert Kraut of Carnegie Mellon University in Pittsburgh, Pennsylvania, said in a statement to the news. The findings suggest that "Rather than encourage students to use the Internet alone for research, teachers might give pupils online group homework to complete with classmates. Local groups might build websites that allow neighbors to discuss local affairs ." "Before the technology develops and can be really more _ , people shouldcontrol their wishes to use much of the Internet," Dr. Kraut and other experts advise. In order to control their children and encourage family activities, parents might think of putting the computer in the living room rather than in a child's room, they suggest. Dr. Kraut also suggests that when surfing on the net, especially when chatting with strangers on the net, children should not use their real names, and that they should not tell the addresses, telephone numbers to the strangers. Which of the following do the experts suggest? A) Teachers should ask the students to finish their homework alone on the Internet. B) Schools should build websites for students to discuss problems on the Internet. C) Instead of putting the computer in the sitting room, parents should put it in a child's room. D) Children should not give their real names, addresses or telephone numbers to the strangers.
D
Q: I opened my eyes and found the doctors were standing by my bed. They had some welcome news. I had been living in the bone marrow transplant unit of the famous cancer center for a month. The doctors told me that while my immune system was still very weak, my brother Adam's healthy cells were beginning to work in my bone marrow. I was showing signs of progress: I was able to walk around---slowly---without assistance, my blood counts were going in the right direction, and I no longer needed to be connected continuously to an IV machine. It was the"graduation"day. The doctors were sending me to the Hope Room, a halfway house sponsored by the American Cancer Society. I would live there for the next three months and would be cared for by my boyfriend, Seamus, who is again helping me write this column for Internet readers as I regain my strength. Pushed out of the hospital in a wheelchair, I took my first breath of fresh air in weeks. But before I could enjoy this moment, my mother helped me put on a mask. I gave her an annoyed look, but I knew she was right. For the immediate future, I would need to wear gloves and a mask wherever I wanted to go in public. No subways, no crowds. However, I can enjoy my freedom, even if cancer continues to limit my choices. My new freedom means not being waken up every couple of hours by a nurse with pills in her hand, not seeing doctors with their masks and their caring, and not being connected to an IV machine 24 hours a day. Freedom also means being patient with my mother and boyfriend, who try hard to cook for me in the kitchen and make sure I don't fall off my chair in the shower. Freedom is the responsibility to take medicine on time. Freedom also means returning to the hospital several times a week to receive follow-up examinations. But all is well worth. You surely know the reason. I love every one of my family and I love Seamus. The author gave her mother an annoyed look because _ . A) her mother didn't follow the doctors' instructions B) her mother didn't push her wheelchair in the right way C) her mother took a wrong mask D) she was eager for fresh air
A: D
Q: The goal of earthquake prediction is to give early enough warning. The U.S. Geological Survey conducts and supports research on the likelihood of future earthquakes. Scientists estimate earthquake probabilities in two ways: by studying the history of large earthquakes in a special area and the rate at which strain accumulates in the rock. Scientists study the past frequency of large earthquakes in order to determine the future likelihood of similar large shocks. For example scientists researched the large earthquakes in the San Francisco Bay region during the 75 years between 1836 and 1911. For the next 68 years, no earthquakes of magnitude 6 or large occurred in the region. Beginning with a magnitude 6 shock in 1979, the earthquakes in the region increased dramatically; between 1979 and 1989, there were four magnitude 6 or greater earthquakes, including a magnitude 7.1 earthquake. So scientists estimated that the probability of a magnitude 6.8 or larger earthquake occurring during the next 30 years in the region is about 67 percent. Another way to predict earthquakes is to study how fast strain accumulates. When plate movements build the strain in rocks to a critical level, like pulling a rubber band too tight, the rocks will suddenly break and slip to a new position. Scientists measure how much strain accumulates along a fault each year, how much time has passed since the last earthquake, and how much strain was released in the last earthquake. This information is used to calculate the time required for the accumulating strain to build to the level that results in an earthquake. This simple model is so complicated that such detailed information about faults is rare. In the United States, only the San Andreas Fault System has adequate records for using this prediction method. Scientific understanding of earthquakes is of vital importance to the Nation. As the population increases, expanding urban development and construction encroach upon areas susceptible to earthquakes. With a greater understanding... Which is TRUE according to the passage? A) There were four magnitude 6 earthquakes in the San Francisco Bay region between1979 and1989. B) The accumulating strain of the fault to a certain level results in the earthquake. C) About 68 years after 1911, no earthquakes occurred in the San Francisco Bay region. D) The fast increasing population on the earth is the main cause of the earthquake.
A: B