印度节制人口最大的难题来自于（）。 A.宗教信仰 B.经济 C.政府 D.医疗

12月15日，某地木业公司发生一起火灾爆炸事故，经初步调查，是因为部分柴油泄漏起火所致．从燃烧条件分析，柴油是______，此时，用水灭火效果不理想，对此合理的解释是______．最终，消防队员使用泡沫灭火剂将火扑灭，泡沫灭火剂的反应原理类似于Na₂CO₃和稀盐酸反应，写出Na₂CO₃和稀盐酸反应的化学方程式______．

Many of us dream of having thousands and thousands of dollar to spend on what we desire We can buy lottery tickets, enter contests or spend hours building a business or invest in the stock market. We are sure that when we have plenty of money, we will be happy.

While having some money does have an impact on our level of happiness, having a lot of money does not. It is reported that Americans whose income goes from $20,000 a year to $50,000 a year are more likely to be happy. But beyond $50,000, happiness does not increase as salaries go up. It is because we are never satisfied. Catherine Sanderson, a psychology professor at Amherst College says, "We always think if we just had a little more money, we’d be happier. But when we get there, we are not."

Daniel Gilbert, a psychology professor at Harvard notes,"The more you make, the more you want. The more you have, the less it brings you joy. We incorrectly assume we’Il get more pleasure from more, and we don’t."

The things money can buy don't make you happy either. A lot of research suggests that you won't find the "good life" buying expensive "toys". You finally buy that BMW you've always wanted and it soon loses its appeal. Then, instead of wondering if a new car is what really makes you happy, you decide you just need a different new car. It is an endless cycle.

To really be happy, you need to understand what makes you happy in the first place. One secret of happiness is people. Surveys have found that people need people. Those who have five or more close friends are 50% more likely to describe themselves as "very happy". Good relationships have a far greater effect on happiness than larger salary. Andrew Oswald, an economist at England's University of Warwick says, "B you are looking for happiness in life, find the right husband or wife rather than trying to double your salary."

So invest your time and energy in people. The reward is much bigger in terms of happiness!

小题1:In Paragraph 1 the author intends to tell us the "belief" that

A．we are unhappy because we often lack money

B．people can buy what they want if they have enough money

C．more money will make one's dreams come true

D．happiness will result from more money小题2:Which of the following statements would the author agree to?

A．Having some money brings happiness to some degree.

B．The more money one earns, the sadder one becomes

C．Buying expensive things will surely bring pleasure

D．We get nothing from buying expensive things we want.小题3:Why does happiness not increase with pay rises?

A．Most of us have a psychological problem.

B．People are not content with what they get.

C．It is human nature to be unhappy.

D．Happiness has nothing to do with money.小题4:In order to find happiness we should

A．always make new friends

B．take no notice of our salaries

C．focus on good relationships

D．invest our money in our friend

在工程网络图中，M工作的最早开始时间为第9天，持续时间为4天，该工作有三项紧后工作，它们最早开始时间分别为第15天、第17天、第19天，则M工作的自由时差为（）天。

A．1

B．2

C．3

D．4

依据施工合同示范文本规定，承包人收到竣工结算价款后( )天内将竣工工程交付发包人，施工合同即告终止。

A．7
B．14
C．28
D．42

《劳动法》规定，劳动者必须连续工作满（）才能享受带薪休假。

A.1

B.2

C.3