公司奉行剩余股利政策的目的是保持理想的资本结构；采用固定或持续增长的股利政策主要是为

脂肪可以在人体缺氧条件下供给能量。( )

有计划地进行预防接种，就是___________。免疫是人体的一种_________，是机体识别“自己”和“非己”的一种保护性反应。

阅读理解。

     Life is difficult.

    It is a great truth because once we truly understand and accept it, then life is no longer difficult.

    Most do not fully see this truth. Instead they complain(抱怨) about their problems and difficulties

as if life should be easy. It seems to them that difficulties stand for a special kind of suffering

especially forced on them or else on their families, their class, or even their nation.

    What makes life difficult is that the process of facing and solving problems is a painful one.

Problems, depending on their nature, cause sadness, or loneliness(孤独) or regret or anger or fear.

    These are uncomfortable feelings, often as painful as any kind of physical pain. And since life

causes a lot of problems, life is always difficult and is full of pain as well as joy.

    Yet, it is in this whole process of solving problems that life has its meaning. Problems are the

serious test that tells us success from failure. When we want to encourage the growth of human

spirit, we encourage the human ability to solve problems, just as in school we set problems for

our children to solve. It is through the pain of meeting and working out problems that we learn.

As Benjamin Franklin said, "Those things that hurt, instruct(指导)." It is for this reason that wise

people learn not to fear but to welcome the pain of problems.

1．Which sentence best express the central point of the passage?

A. Problems and difficulties represent a special kind of suffering.

B. We become stronger by facing and solving problems of life.

C. Life is difficult because our problems bring us pain.

D. People like to complain about their problems.

2. The writer probably used just one short sentence in the first paragraph to ___.

A. save space                

B. persuade readers

C. make readers laugh          

D. get readers' attention

3. The main idea of paragraph 3 is that _________.

A. most people feel life is easy

B. the writer feel life is easy

C. the writer likes to complain about his problems

D. most people complain about how hard their lives are

4. According to the passage, we give school children difficult problems to solve in order to ______.

A. encourage them to learn

B. teach them to fear the pain of solving the problems

C. help them learn to deal with pain

D. teach them how to respect problems

5. The saying from Benjamin Franklin "Those things that hurt, instruct" suggests   that ______.

A. we do not learn from experience    

B. we do not learn when we are in pain

C. pain teaches us important lessons

D. pain cannot be avoided

在标底的编制程序中，收集编制资料后进行的工作是( )。

A．确定标底的编制单位

B．参加交底会及现场勘察

C．编制标底

D．审核标底价格

吲哚美辛可减弱卡托普利降压效果的原因是

A．二氮嗪

B．促进患者排泄

C．抑制前列腺素合成

D．竞争ACE

E．提高后者血浆蛋白结合率