题目内容
Some say everyday miracles are predestined—the right time for the appointed meeting. And it can happen anywhere. In 2001, 11-year-old Kevin Stephan was a bat boy for his younger brother’s Little League team in Lancaster, New York. It was an early evening in late July. Kevin was standing on the grass away from the plate, where another youngster was warming up for the next game. Swinging his bat back and forth, giving it all the power an elementary school kid could give. The boy brought the bat back hard and hit Kevin in the chest. His heart stopped. When Kevin fell to the ground, the mother of one of the players rushed out of the stands to his aid. Penny Brown hadn’t planned to be there that day, but at the last minute, she changed her shift at the hospital to see her son’s performance. She was given the night off. Penny bent over the senseless boy whose face had already started to turn blue, and gave CPR (心肺复苏术), breathing into his mouth and giving chest compressions. And he revived in the end. Kevin wasn’t just a volunteer for his brother’s baseball team—he was a Boy Scout, one who went on to achieve Scouting’s highest rank, Eagles. After his recovery, he became a volunteer junior firefighter, learning some of the emergency first-aid techniques that had saved his life. He studied hard in school and was saving money for college by working as a dishwasher in a local restaurant in his spare time. Kevin, now 18, was working in the kitchen when he heard people screaming, customers in confusion, employees rushing toward a table. He hurried into the main room and saw a woman there, her face turning blue, her hands at her throat. She was choking. Quickly Kevin stepped behind her, wrapped his arms around her and clasped his hands. Then, using skills he’d first learned in Scouts. The food that was trapped in the woman’s throat was freed. The color began to return to her face. "The food was stuck. I couldn’t breathe," she said. She thought she was dying. "I was very frightened." Who was the woman Penny Brown. The underlined word "revived" (Paragraph 3) most likely means ______.
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Without transportation, there could be no trade. Without trade, there could be no towns and cities. Towns and cities are traditionally the 1 of civilization. Therefore, transportation helps make civilization 2 . Throughout most of the prehistoric period, people lived by hunting, fishing, and 3 wild plants. They had no beasts of burden, wheeled vehicles, or roads. People traveled 4 and carried their infants and belongings strapped to their backs or heads. Loads too heavy for one person to carry were strapped to a pole and carried by two people. 5 , people learned that they could drag loads along the ground on sledges. During late prehistoric times, people began to build sledges with runners. When people developed agriculture and began to establish 6 settlements, trade between settlements started to develop, which created a need for better 7 of transportation. The donkey and the ox, which had been tamed for food products and farm work, helped 8 this need. The use of donkeys and oxen as beasts of burden enabled people to 9 heavier loads than they could before. People also began to develop water transportation during prehistoric times. They built rafts of such 10 as logs or reeds. Later, people learned 11 to make dugouts and canoes. People paddled these early craft with their hands or propelled them with paddles or 12 . The wheel was invented about 3500 B. C. and sailboat about 3200 B. C. Wheeled vehicles and sailing vessels 13 transportation. But the speed of transportation improved only 14 over the centuries. Inventors produced the first engine 15 vehicles during the late 1700’s and the early 1800’s. This development marked the beginning of a revolution in transportation that has continued to the present.
已知线性表(a1，a2，a3，…，an)存放在一维数组A中。试设计一个在时间和空间两方面都尽可能高效的算法，将所有奇数号元素移到所有偶数号元素前，并且不得改变奇数号(或偶数号)元素之间的相对顺序，要求： 说明你所设计算法的时间复杂度和空间复杂度。
—Which of these two books will you take —I’ll take ______. I need them to kill time on my journey.
Without transportation, there could be no trade. Without trade, there could be no towns and cities. Towns and cities are traditionally the 1 of civilization. Therefore, transportation helps make civilization 2 . Throughout most of the prehistoric period, people lived by hunting, fishing, and 3 wild plants. They had no beasts of burden, wheeled vehicles, or roads. People traveled 4 and carried their infants and belongings strapped to their backs or heads. Loads too heavy for one person to carry were strapped to a pole and carried by two people. 5 , people learned that they could drag loads along the ground on sledges. During late prehistoric times, people began to build sledges with runners. When people developed agriculture and began to establish 6 settlements, trade between settlements started to develop, which created a need for better 7 of transportation. The donkey and the ox, which had been tamed for food products and farm work, helped 8 this need. The use of donkeys and oxen as beasts of burden enabled people to 9 heavier loads than they could before. People also began to develop water transportation during prehistoric times. They built rafts of such 10 as logs or reeds. Later, people learned 11 to make dugouts and canoes. People paddled these early craft with their hands or propelled them with paddles or 12 . The wheel was invented about 3500 B. C. and sailboat about 3200 B. C. Wheeled vehicles and sailing vessels 13 transportation. But the speed of transportation improved only 14 over the centuries. Inventors produced the first engine 15 vehicles during the late 1700’s and the early 1800’s. This development marked the beginning of a revolution in transportation that has continued to the present.
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