汇票未按照规定期限提示承兑的，持票人丧失票据权利。

读下图，回答问题

按要求写出下列数码代表的地理事物：

支流：①_________ ②__________

湖泊：③___________ ④___________

水电站：⑤_________________

城市：⑥_______（直辖市）

发源地：⑦_____________

注入的海洋：⑧_________

分液漏斗是把密度不同且互不相溶的液体分离的仪器。下列各组物质中，能用分液漏斗进行分离的是

A．四氯化碳和液溴

B．汽油和花生油

C．苯和食盐水

D．酒精和水

阅读理解。

     Learning to save money when you're young is an important lesson. All good lessons and habits begin

early, and saving is a skill that everyone needs. Many people-adults included-do not have a good sense of

saving for the long run.

     I have been lucky to learn this lesson early because I have had a grass-cutting business since I was 10

years old. Of the money I make, I spend about 10 percent and save the other 90.

     Making sure you save and don't spend too much is a good way to build up wealth. I have put my

earnings in a bank. Many teens I know spend all the money they earn, so it never has a chance to grow.

Young people should realize that their teenage years are a great time to begin saving.

     At high school, many parents pay for almost everything, so your expenses can be small. If you have a

job, you should have fun with some of the money. But you should also save some so that it will grow. Then

you can begin planning for your future. When you spend money, you not only lose that money, but also lose

the interest you should have earned by saving it.

     After high school, college is expensive and then "real" life begins, with expenses such as food and rent. If

you can hold onto a good percentage of the money you earn as a teen, going to college and buying a house

will be much easier. The earlier you begin saving, the more time the money has to grow. If you are in your

thirties without any savings, you will always have to struggle, The earlier you begin saving, the easier it is to

create a nest egg (储备金).

1. According to the author, a man can build up his wealth by _____.

A. finding a good job

B. saving money when he grows up

C. buying a house

D. saving money and spending less

2. The author seems to believe _____.

A. it is hard to save money when in high school

B. if you have a job, you needn't save money

C. when spending one loses more than the money he pays

D. going to college will be easier if you borrow money from the bank

3. What can be the best title for the passage?

A. Saving for future

B. Learning to spend less

C. How to save money

D. How to make money

关于概率密度函数p(x)，应强调的是( )。

A．对应图上的纵轴原是“单位长度上的频率”，由于频率的稳定性，可用概率代替频率，从而纵轴就成为“单位长度上的概率”

B．它最后形成的曲线是概率曲线

C．它最后形成的曲线可位于X轴的上方，也可位于X轴下方

D．曲线与X轴所夹面积小于等于1

发展问题主要是指“南北问题”，也就是发展中国家与发达国家之间的关系问题。当今世界发展问题更加严重，其根本原因是（）

A.发展中国家自身的落后

B.发展中国家经济互补性强，但南南合作太少

C.国际政治经济旧秩序

D.发达国家对发展中国家的长期掠夺和剥削