当液体中某点的绝对压强大于当地的大气压强时，该点的相对压强为（）。 A.正值 B.负

“几个小时前我还是皇家警察，但现在我已是一名堂堂正正的香港警察了。”该警察说这句话的背景是

[    ]

A．邓 * * 提出“一国两制”

B．中英签署关于香港问题的《联合声明》

C．《中华人民共和国香港特别行政区基本法》的颁布

D．中华人民共和国香港特别行政区成立

膜分离技术的优点是（）

A.不发生相变化，能耗低

B.适用于热敏性物质

C.适用于特殊溶液体系的分离

D.不会出现浓度差极化现象

E.装置简单容易操作

（12分）在你已学知识范围内选择正确的物质填空，以满足下列转化的要求：A、B、C可以是物质也可以是该物质的溶液：

（1）X、Y均为CO₂气体，A的化学式：            ，

A与C反应的离子方程式：                                           

（2）X、Y均为稀盐酸，C为气体，A的化学式：            ，

A与C反应的离子方程式：                                                      

（3）X、Y均为NaOH溶液，A的化学式：             ，

A与C反应的离子方程式：                                                      

（4）X为稀盐酸，Y为Cl₂，A的化学式：             ，

A与C反应的离子方程式：                                                      

阅读理解。

     While it is impossible to live completely free of stress, it is possible to prevent stress as well as reduce its

effect when it can't be avoided. The US Department of Health and Human Services offers the following

suggestions for ways to deal with stress.

     ◆Try physical activity

     When you are nervous, angry or upset, try releasing the pressure through exercise or physical activity.

Running, walking, playing tennis, and working in your garden are just some of the activities you might try.

     ◆Take care of yourself

     You should make every effort to eat well and get enough rest. If you easily get angry and can't sleep well

enough, or if you're not eating properly, it will be more likely that you will fall into stressful situations. If stress

repeatedly keeps you from sleeping, you should consult a doctor.

     ◆Make time for yourself

     Schedule time for both work and entertainment. Don't forget, play can be just as important to your overall

well-being as work. You need a break from your daily routine to just relax and have fun. Go window-shopping

or work on a hobby. Allow yourself at least a half hour each day to do something you enjoy.

     ◆Make a list of things to do

     Stress can come from disorganization and a feeling that"there's so much to do, and not enough time".

Trying to take care of everything at once can be too much for you and as a result, you may not achieve anything. Instead, make a list of everything you have to do, then do one thing at a time, checking off each task as it is

completed. Set out to do the most important task first.

1. Why does the writer write this passage?

A. To give descriptions.

B. To make suggestions.

C. To raise problems.

D. To ask for advice.

2. The underlined word "releasing" is closest in meaning to"______".

A. getting rid of

B. increasing

C. putting up with

D. transforming

3. What is the best title for the passage?

 A. Stress-Good or bad?

B. Stress-Fight or flight?

C. Stress-Let it be

D. Stress-Let's beat it