简述酶活性的控制。

阅读理解。

     Most people want to be happy, but few know how to find happiness. Money and success alone do not

bring lasting happiness. Aristotle, a Greek thinker, said, "Happiness depends upon ourselves." In other words,

we make our own happiness. Here are a few suggestions to help you be happier.

     The first secret of happiness is to enjoy the simple things in life. Too often, we spend too much time

thinking about the future-for example, getting into college or getting a good job-that we fail to enjoy the

present. You should enjoy life's simple pleasures, such as reading a good book, listening to your favorite

music, or spending time with close friends. People who have several close friends often live happier and

healthier lives.

     Another secret to living a happy life is to be active. Many people go dancing or play sports. People can

forget about their problems and only think about the activities.

     Finally, many people find happiness in helping others. Studies show that people feel good when they

spend their time helping others. If you want to feel happier, do good things for someone. You can help a

friend with his or her studies, go shopping to buy food for an elderly person, or simply help out around the

house by washing the dishes.

1. The best title (标题) of this passage is ________.

A. The Secrets of  Happiness

B. Money Makes You Happy

C. Ideas for Helping Other People to Be Happy

D. Good Friends Make You Happy

2. The second paragraph tells us that ________.

A. the more friends you have, the happier you'll be

B. we shouldn't think about our future

C. happiness is to enjoy the simple things in life

D. some people fail to live a happy life

3. The passage gives us ________ pieces of advice on happiness.

A. one

B. two

C. three

D. four

4. The writer thinks that ________.

A. everyone knows how to live a happier life

B. It's wrong to spend time on work

C. hobbies take up too much time

D. doing good things for someone can make you happier

5. Which of the following is not mentioned in the passage?

A. Reading a good book

B. Traveling to a foreign country

C. Playing a sport

D. Spending time with close friends

男性，32岁。因肛周持续性剧痛伴低热3天就诊。检查发现肛旁明显红肿，有硬结。诊断应为（）

A.直肠黏膜下脓肿

B.肛周脓肿

C.骨盆直肠间隙脓肿

D.坐骨肛管间隙脓肿

E.高位肌间脓肿

空气中有害物质的存在状态不一样，有的以气体或蒸气逸散于空气中；有的以液体或固体颗粒分散于空气中；一氧化碳的状态是（）

A.蒸气

B.气体

C.气溶胶

D.蒸气和气溶胶共存

E.雾

对于商业银行来说，为了实现盈利性、流动性和安全性的目标，应该保持较强的流动性，流动性越强越好。