制定旅游产业政策的原因是()。A．有利于国家加强和改善宏观调控 B．有效调整和优化产

甲公司2002年实现的税后净利为850万元，若2003年的投资计划所需资金800万元，公司的目标资金结构为自有资金占60%。
(1)若公司采用剩余股利政策，则2002年末可发放多少股利
(2)若公司发行在外的股数为1 000万股，计算2002年每股利润及每股股利。
(3)若2003年公司决定将公司的股利政策改为逐年稳定增长的股利政策，设股利的逐年增长率为2%，投资者要求的必要报酬率为12%，计算该股票的价值。

在铁路货运编组站内，将同一铁轨上的车厢A和车厢B联结在一起．车厢A原来静止在铁轨上，车厢B以速度v₀向着车厢A运动，两节车厢接触后连在一起．已知车厢A的质量m，车厢B质量3m．求

（1）两节车厢联结以后的共同速度；

（2）联结过程中有多少机械能的损失．

故障抢修必须把人身安全放在首位，按有关规程、制度、办法采取可靠的安全措施，杜绝人身伤亡事故的发生。

In the past year, a lot has changed in the field of human spaceflight. (46)In January, President George Bush brushed aside the fact that America’s entire space-shuttle fleet was grounded when he announced grandiose plans to put people back on the moon, and then to launch a manned mission to Mars. (47) In June, Burt Rutan, an American aeronautical engineer, showed that human spaceflight was no longer the preserve of governments by sending a man to the edge of space in Space Ship One, a privately financed vehicle that cost about the same to build as a luxury yacht. That was followed in September by Sir Richard Branson, the British entrepreneur behind the Virgin brand, announcing that he had signed a deal with Mr. Rutan to work on plans for a fleet of five suborbital vehicles developed from Space Ship One.

(48) Now, in the dying days of the year, America’s Congress has passed a bill that unravels a tangle about who would be responsible for regulating the fledgling industry, and under what terms. (49) The bill also allows passengers to fly, on the understanding that this new generation of vehicles may not be as safe as taking a commercial flight between, say, New York and London.

The official line from Virgin Galactica, as Sir Richard’s latest venture is modestly named, is that this coming change in the law makes no practical difference to the firm’s plans, since they do not intend to fly unless they can make their spacecraft as safe as a private jet. But it must surely come as some sort of relief. In any case, Will Whitehorn, director of corporate affairs at Virgin’s headquarters in London, and soon to become the president of Virgin Galactica, says that work is under way on a mock-up of the interior of a new spacecraft that will hold five passengers. (50) Virgin has already committed $20m towards licensing the SpaceShipOne technology from Mr. Rutan and his financial backer Paul Allen, a software billionaire.

(50) Virgin has already committed $20m towards licensing the SpaceShipOne technology from Mr. Rutan and his financial backer Paul Allen, a software billionaire.