油瓶中油的体积乘5，再加上60ml，就和油桶里的油一样多，油桶里有油2.5L．油

2007年11月26日，“嫦娥一号”卫星从距离地球38万公里的环月轨道传回了清晰的可见光图片，标志着我国首次探月工程取得圆满成功。首次探月工程的成功实施，为我们进一步推进科技事业发展与创新，提高我国整体科技能力和水平开辟了新的道路，积累了宝贵的经验。我国探月工程的成功经验可概括为“坚持以实施重大科技工程为牵引，带动研发、制造、应用整体水平；坚持勇于探索科学求实的精神，着力提高自主创新能力；坚持多部门协作，形成科学高效系统管理模式；坚持尊重知识、尊重人才，培养造就一支高素质人才队伍。”　　

阅读材料回答：运用市场经济的有关知识，说明如何推进我国的科技进步与创新。(9分)　　

刚使用的胶带造成跑偏其原因是与胶带（）和质量有关。

A、整体

B、局部

C、结构

城市传输网

高压钠灯光源一般显色指数(Ra)在60＞Ra≥40范围。( )

Gambling, despite being a well known highly risky pursuit that has caused many tragedies, does not scare gamblers away; instead, many consciously join the legion of gamblers, in spite of possible failure in store for them.
How does a gambler get bogged down in such a risky occupation Most novices do not embrace an ambition to get rich through gambling. Instead, they might think gambling is merely an exciting game through which they can try their luck and bring excitement to their dull lives. Often, they win a small sum at the first several tries, and then became bold, daring to play for larger stakes. With certain encouraging "achievements", they are now confident of their good luck and gambling skill. At this point, they are at a crossroads: a step forward to become a professional gambler, or a step backward to return to normal life.
Unfortunately, most of them get bogged down in gambling, because the greedy notion of getting something for nothing is their underlying motive. Openly, they deny that they have such a shameful motive, but in the recesses of their soul, there is an undeniable ambition to get great sums of money through gambling. However, I’ve never heard of any myth about a person who got wealth and prestige through gambling. Instead, I’ve heard many true stories about gamblers who ended their lives in misery. Once a person gets bogged down in gambling, it is rather hard for him to tear himself away from that evil. Throughout history, few gamblers have ever repented about gambling, which led them to tragedy--failure in business, destitution, family disintegration, divorce, suicide, crime, etc.
What should a person do to get rid of such a nightmare It is very easy. To prevent getting involved in gambling, the most effective means is to stop at the first try. It is easy for any intelligent person to stop at the first try but it is also easy for a person of weak will to receive an "invitation" to have a try. The novice often finds an excuse for the first try, thinking or murmuring, "This is the only and the last try." In most cases, the novice will not stop at the first try--he will try again, and finally he will become an addict.
A "vindictive" psychology drives these new gamblers to be entrapped in gambling houses. As they lose some money, they get angry and try to "avenge" themselves, so that they play for higher stakes and lose more, until they sell all they have to get money and go back to the gambling house. Finally, they have debts beyond their capacity to pay. To dodge their debtors, they have to hide or escape, or take risky and criminal actions, for example, killing or threatening the debtors. Many gamblers end their lives in jail.

The author wrote this essay to

A．analyze gambler’s psychological reason of gambling.

B．criticize gamblers and gambling.

C．warn gamblers to stay away from gambling.

D．introduce the history of gamblin