IP地址块202.192.33.160/28的子网掩码可写为______。 A．25

阅读理解。

     It was at least two months before Christmas when nine-year-old Almie Rose told her father and me that

she wanted a new bicycle. As Christmas drew nearer, her desire for a bicycle seemed to fade (消退), or so

we thought. We bought her a lovely doll, and a doll house. Then, much to our surprise, on December 23rd,

she said that she "really wanted a bike more than anything else." But it was just too late. With such a lot of

preparations to do for the Christmas dinner we did not have the time to buy our little girl a bike. So, here we

were Christmas Eve around 9:00 p.m., with Almie and her six-year-old brother, Dylan, sleeping in their beds.

Now we could only think of the bicycle and the disappointment of our child. "What if I make a little bicycle

out of clay (泥) and write a note that she could trade (交易, 交换) the clay bike in for a real bike?" her dad

asked. So he spent the next four hours making a tiny clay bike. On Christmas morning, we were excited for

Almie to open the little gift box with the beautiful red and white clay bike and the note. Finally, she opened it

and read the note aloud. "Does this mean that I can trade in this bike that Daddy made me for a real one?" I

said, "Yes." Almie had tears in her eyes when she replied, "I could never trade in this beautiful bicycle that

Daddy made me. I'd rather keep this than get a real bike." At that moment, we would have moved heaven and

earth to buy her every bicycle in the world!

1. Choose the right time order of the following events.

    a. The girl asked for a new bike.

    b. The girl opened the little gift box.

    c. The parents bought the girl a modern and popular doll.

    d. The father made the girl a bike with clay.

    e. The girl would rather keep the clay bike than get a real one.

A. a, b, c, e, d 　　　　　

B. a, c, d, b, e

C. a, c, b, d, e 　　　　　

D. a, b, d, c, e

2. Which of the following statements is true according to the passage?

A. The parents wanted the girl to have the clay bike for ever.

B. Tears were in the girl's eyes because she didn't like the present at all.

C. The girl never lost her desire for a bike.

D. The parents paid little attention to the daughter's desire for a bike.

3. Why did Dad make the clay bicycle? 

A. He wanted his daughter to buy a real one.　

B. He didn't want to disappoint his daughter.

B. He thought his daughter would like it.　　

D. He wanted to give his daughter a surprise.

4. What can we know from the last sentence?

A. The parents were sad and encouraged.　　　

B. The parents felt nervous and shy.

C. The parents were moved and felt proud of the girl.

D. The parents felt unhappy for the girl.

5. Which do you think is the best title (标题) for the story?

A. A lovely little girl　　　　　　　　　　

B. A great and serious father

C. A clay bike　　　　　　　　　　　　

D. Christmas shopping

有关资料表明：人体出汗或潮湿时的电阻为200—800Ω；人体中电流超过30mA时将会造成生命危险。若某人身体潮湿时的电阻为500Ω，则当他接触电压为220V的照明电路时，通过他的电流为____mA。请你根据计算结果为下图配上解说词：______

男性，30岁。餐后1小时突发上腹部剧痛，很快扩散至全腹，呈持续性腹痛，伴有恶心、呕吐。查体：腹式呼吸消失，全腹压痛、反跳痛、肌紧张明显，肝浊音界消失。腹部X线平片检查：见膈下游离气体。临床诊断胃十二指肠穿孔伴弥漫性急性腹膜炎。

目前，应采取的治疗措施是（）.

A.禁食，胃肠减压，做进一步检查

B.保守治疗，病情无好转或加重，剖腹探查

C.腹腔诊断性穿刺，抽出浑浊渗出液，剖腹探查

D.补液，应用抗生素12小时，剖腹探查

E.急诊剖腹探查

下列关于人力资本投资说法不正确的是( )。

A．在其他条件相同的情况下，投资后的收入增量流越长(即收益时间越长)，则一项人力资本投的净现值越可能为正

B．在其他条件相同的情况下，人力资本投资的成本越小，就会有越多的人愿意投资于人力资本

C．经济衰退来临，上大学的人就会减少

D．在其他条件相同的情况下，大学毕业生与高中毕业生之间的收入差距越大，愿意投资于大学教育的人就越多

秋水仙素在导致基因突变和染色体变异时，它分别作用于细胞分裂的（）

A.前期和中期

B.间期和中期

C.间期和前期

D.间期和间期