根据课文内容把空格填完整。 （ ）的知识 （ ）的图片 （ ）的心田 （ ）的礼物

在细胞的生命历程中，会出现分裂、分化等现象。下列叙述错误的是（）

A.细胞的有丝分裂对生物性状的遗传有贡献

B.哺乳动物的造血干细胞是未经分化的细胞

C.细胞分化是细胞内基因选择性表达的结果

D.通过组织培养可将植物椰肉细胞培育成新的植株

农民工是我国现代化建设的重要力量，但是，作为一个流动性比较大的群体，农民工的医疗、养老问题一直受到地域、年限的诸多限制。2010年两会召开前，有些农民工建议全国人大代表两会提交一份关于农民工医疗、养老等问题的提案。这些农民工的行为是在( )

A．依法参与民主选举

B．依法参与民主决策

C．依法参与民主管理

D．依法参与民主监督

为"学生"表增加一个"平均成绩"字段的正确命令是　　ALTER TABLE 学生 ADD【11】平均成绩 N(5，2)

阅读理解诶。

     A lot of us lose life's tough battles by starting a frontal (正面的) attack-when a touch of humor might well

enable us to win. Consider the case of a young friend of mine, who hit a traffic jam on his way to work shortly

after receiving an ultimatum (最后通牒) about being late on the job. Although there was a good reason for

Sam's being late-serious illness at home-he decided that this by-now-familiar excuse wouldn't work any longer.

His supervisor was probably already pacing up and down preparing a dismissal speech.

     Yet, Sam entered the office at 9:35. The place was as quiet as a locker room (更衣室); everyone was hard

at work. Sam's supervisor came up to him. Suddenly, Sam forced a grin and stretched out his hand. "How do

you do!" he said. "I'm Sam Maynard. I'm applying for a job, which, I understand, became available just 35

minutes ago. Does the early bird get the worm?"

     The room exploded in laughter. The supervisor clamped off a smile and walked back to his office. Sam

Maynard had saved his job-with the only tool that could win, a laugh.

     Humor is a most effective, yet frequently neglected, means of handling the difficult situations in our lives.

It can be used for patching up differences, apologizing, saying "no", criticizing, getting the other fellow to do

what you want without his losing face. For some jobs, it's the only tool that can succeed. It is a way to discuss

subjects so sensitive that serious dialog may start a quarrel. For example, many believe that comedians on

television are doing more today for racial and religious tolerance than people in any other forum.

1. Why was Sam late for his job?

A. Because he was ill.

B. Because he got up late.

C. Because he was caught in a traffic jam.

D. He was busy applying for a new job.

2. The main idea of this passage is _____.

A. Sam Maynard saved his job with humor

B. humor is important in our lives

C. early bird gets the worm

D. humor can solve racial discriminations

3. The phrase "clamped off" in Paragraph 3 means _____.

A. tried to hold back

B. tried to set

C. charged

D. gave out

4. Which of the following statements can we infer from the passage?

A. Many lose life's battles for they are lacking in a sense of humor.

B. It wasn't the first time that Sam came late for his work.

C. Sam was supposed to come to his office at 8:30.

D. Humor is the most effective way of solving problems.

普通护照的具体签发办法，由（）规定。

A.外交部

B.公安部

C.公安局

D.出入境管理处