空间两条互相平行的直线是（ ）
A．在空间没有公共点的直线
B．分别在两个平面内的直线
C．分别在两个不同的平面内且没有公共点的两条直线
D．在同一平面内且没有公共点的直线
答案：D
本题考查空间两直线位置关系和空间想象能力.
空间两直线的位置关系是：相交，平行和异面；其中相交或平行的直线是共面直线；即在同一平面内且有公共点的两直线是相交直线；在同一平面内且没有公共点的两直线是平行直线.异面直线是不在任何一个平面内的两条直线.故选D
| Computer programmer David Jones earns ￡35,000 a year designing new computer games, yet he cannot find a bank prepared to let him have a check card. Instead, he has been told to wait another two years, until he is 18. The 16-year-old works for a small firm in Liverpool, where the problem of most young people of his age is finding a job. David’s firm releases two new games for the expanding home computer market each month. But David’s biggest headache is what to do with his money. Despite his salary, earned by inventing new programs within fight schedules, with bonus payments and profit-sharing, he cannot drive a car, take out a mortgage, or obtain credit cards. He lives with his parents in their council house in Liverpool, where his father is a bus driver. His company has to pay ￡150 a month in taxi fares to get him the five miles to work and back every day because David cannot drive. David got his job with the Liverpool-based company four months ago, a year after leaving school with six O-levels and working for a time in a computer shop. "I got the job because the people who run the firm knew I had already written some programs," he said. "I suppose ￡35,000 sounds a lot but actually that’s being pessimistic. I hope it will come to more than that this year." He spends some of his money on records and clothes, and gives his mother ￡20 a week. But most of his spare time is spent working. "Unfortunately, computing was not part of our studies at school," he said. "But I had been studying it in books and magazines for four years in my spare time. I knew what I wanted to do and never considered staying on at school. Most people in this business are fairly young, anyway." David added, "I would like to earn a million and I suppose early retirement is a possibility. You never know when the market might disappear." |
He was employed by the company because ______.
A．he had worked in a computer shop
B．he had written some computer programs
C．he works very hard
D．he had learned to use computers at school