无序固溶体

下列地点位于东半球的是[ ]

A．125°E，20°N

B．21°W，7°N

C．25°W，25°S

D．35°W，25°N

数据库系统依靠______支持数据独立性。

A．具有封装机制

B．定义完整性约束条件

C．模式分级，各级模式之间的映像

D．DDL语言与DML语言互相独立

Too many people want others to be friends, but they don’t give friendship back. That is why some friendships don’t last long. To have a friend, you must learn to be one. You must learn to treat your friend the way you want your friend to treat you. Learning to be a good friend means learning three rules: be honest; be generous; be understanding.

Honesty is where a good friend starts. Friends must be able to trust one another. If you do not tell the truth, people usually find out. If a friend finds out that you haven’t been honest, you may lose your friend’s trust. Good friends always count on one another to speak and act honestly.

Generosity means sharing and sharing makes a friendship grow. You do not have to give your lunch money or your clothes of course. Instead you have to learn how to share things you enjoy, like your hobbies and your interests. Naturally you will want to share your ideas and feelings. These can be very valuable to a friend. They tell your friend what is important to you. By sharing them, you help your friend know better.

Sooner or later everyone needs understanding and help with a problem. Something may go wrong at school. Talking about the problem can make it easier to solve. Turning to a friend can be the first step in solving the problem. So a friend must listen and understand. You must try to put yourself in your friend’s place so you can understand the problem better.

No two friendships are ever exactly alike. But true friendships have three things in common. If you plan to keep your friends, you must practice honesty, generosity, and understanding.

小题1:What’s the best title of the passage?

A．Three Important Points in Life

B．How to Be a Good Friend

C．Honesty Is the Most Important Quality

D．A Friend in Need Is a Friend Indeed小题2:Some friendships don’t last long because________.

A．some people don’t treat friendship seriously

B．there are too many people who want to make friends

C．they don’t share their lunch money

D．some people only receive friendship but don’t give friendship back小题3:In the 2nd paragraph the underlined phrase “count on” probably means _______.

A．calculate

B．trust

C．matter

D．include

固定水样时，保存剂可事先加入空瓶中，亦可在采样后立即加入水样中。

粘度的表示方法有（）、（）、（）、（）和赛氏粘度等五种。