视力明显障碍的先天性白内障为（） A.前极白内障 B.点状白内障 C.冠状白

市统计局日前公布的《扬州市2012年国民经济和社会发展统计公报》显示全市金融机构年末人民币存款余额3310.84亿元，比年初增加492.96亿元，增长17.5%．3310.84亿元用科学记数法表示为（　　）元．

A．33.1084×10¹⁰

B．3.31084×10¹¹

C．0.331084×10¹²

D．3.31084×10¹⁰

（一）（12分）

① 暮色苍茫，天上出现了星星，悬崖下面的大地越来越暗。这时，树林里有一道手电光照来照去。我听到了杰利和我父亲的声音!父亲的手电光照着我。“下来吧，孩子，”他带着安慰的口气说，“晚饭做好了。”  

②“我下不去!”我哭着说，“我会掉下去，我会摔死的!”  

③“听我说吧，”我父亲说，“不要想着距离有多远。你只要想着你是在走一小步。你能办得到的。眼睛看着我电筒光照着的地方，你能看见石架下面那块岩石吗?”  

④ 我慢慢地把身体移过去。“看见了。”我说。 

⑤“好。”他对我说，“现在你把左脚踏到那块岩石上，不要担心下一步。听我的话。”

⑥ 这似乎能办得到。我小心翼翼地伸出左脚去探那块岩石，而且踩到了它。我顿时有了信心。“很好，”我父亲叫道，“现在移动右脚，把它移到右边稍低一点的地方，那里有另外一个落脚点。”我又照着做了。我的信心大增。“我能办得到的。”我想。 

⑦ 我每次只移动一小步，慢慢爬下悬崖。最后，我一脚踩在崖下的岩石上，投入了父亲强壮的手臂中。我先是啜泣了一会儿，然后，我产生了一种巨大的成就感。这是我永远忘不了的经历。 ——《走一步，再走一步》                                     

小题1:．请用简洁的语言概括选文叙述的内容。(2分)

小题2:．当“我”迈出第一步时，我的那种恐惧心理克服了没有？请你仔细阅读第⑥段，从文中找几个关键词语来证明白己的看法。(2分)

小题3:．从文中找出“我”爬下悬崖过程中心理状态变化的语句。(2分)

最初是毫无信心 ——继而是          ——随后是        ——最后是产生了巨大成就感。

小题4:．“这似乎能办得到。”“我能办得到的。”这两句写出了我的什么变化? (2分)

小题5:．“我”爬下悬崖后，为何还要在父亲的臂弯中“啜泣”，表达了“我”什么情感？(2分)

小题6:．文中的父亲是值得赞赏的。你认为他哪一点最值得赞赏？请说明理由。(2分)

E

“A good book for children should simply be a good book in its own right,” says Mollie Hunter. Born and brought up near Edinburgh, Mollie has devoted her talents to writing primarily for young people. She firmly believes that there is always and should always be a wider audience for any good book whatever its main market is. In Mollie's opinion it is necessary to make full use of language and she enjoys telling a story, which is what every writer should be doing. “If you aren't telling a story, you're a very dead writer indeed,” she says. With the chief function of a writer being to entertain, Mollie is indeed an entertainer. “I have this great love of not only the meaning of language but of the music of language,” she says. “This love goes back to early childhood. I've told stories all my life. I had a school teacher who used to ask us what we would like to be when we grew up and, because my family always had dogs, and I was very good at handling them, I said I wanted to work with dogs, and the teacher always said ‘Nonsense, Mollie, dear, you’ll be a writer.’ So finally I thought that this woman must have something, since she was a good teacher and I decided when I was nine that I would be a writer.”

This childhood intention is described in her novel, A Sound of Chariots, which although written in the third person is clearly autobiographical and gives a picture both of Mollie's ambition and her struggle towards its achievement. Thoughts of her childhood inevitably(不可避免地)brought thoughts of the time when her home was still a village with buttercup meadows and strawberry fields—sadly now covered with modern houses.“I was once taken back to see it and I felt that somebody had lain dirty hands all over my childhood. I'll never go back,”she said. “Never.”“When I set one of my books in Scotland,”she said,“I can recall my romantic (浪漫的) feelings as a child playing in those fields, or watching the village blacksmith at work. And that's important, because children now know so much so early that romance can't exist for them, as it did for us.”

57. What does Mollie Hunter feel about the nature of a good book?

A. It should not aim at a narrow audience.

B. It should not be attractive to young readers.

C. It should be based on original ideas.

D. It should not include too much conversation.

58. In Mollie Hunter's opinion, which of the following is one sign of a poor writer?

A. Being poor in life experience.        B. Being short of writing skills.

C. The weakness of description.           D. The absence of a story.

59. What do we learn about Mollie Hunter as a young child?

A. She didn't expect to become a writer.         B. She didn't enjoy writing stories.

C. She didn't have any particular ambitions.   D. She didn't respect her teacher's views.

60. What's the writer's purpose in this text?

A. To describe Mollie Hunter's most successful books.

B. To share her enjoyment of Mollie Hunter's books.

C. To introduce Mollie Hunter's work to a wider audience.

D. To provide information for Mollie Hunter's existing readers.

在数据库系统中，“事务”是访问数据库并可能更新各种数据项的一个程序执行单元。为了保证数据完整性，要求数据库系统维护事务的原子性、一致性、隔离性和持久性。针对事务的这4种特性，考虑以下的架构设计场景。假设在某一个时刻只有一个活动的事务，为了保证事务的原子性，对于要执行写操作的数据项，数据库系统在磁盘上维护数据库的一个副本，所有的写操作都在数据库副本上执行，而保持原始数据库不变，如果在任一时刻操作不得不中止，系统仅需要删除副本，原数据库没有受到任何影响。这种设计策略称为（1）。事务的一致性要求在没有其他事务并发执行的情况下，事务的执行应该保证数据库的一致性。数据库系统通常采用（2）机制保证单个事务的一致性。事务的隔离性保证操作并发执行后的系统状态与这些操作以某种次序顺序执行（即可串行化执行）后的状态是等价的。两阶段锁协议是实现隔离性的常见方案，该协议（3）。持久性保证一旦事务完成，该事务对数据库所做的所有更新都是永久的，如果事务完成后系统出现故障，则需要通过恢复机制保证事务的持久性。假设在日志中记录所有对数据库的修改操作，将一个事务的所有写操作延迟到事务提交后才执行，则在日志中（4）。当系统发生故障时，如果某个事务已经开始，但没有提交，则该事务应该（5）。

空白（3）处应选择（）

A.能够保证事务的可串行化执行，可能发生死锁

B.不能保证事务的可串行化执行，不会发生死锁

C.不能保证事务的可串行化执行，可能发生死锁

D.能够保证事务的可串行化执行，不会发生死锁

平均深度最大的洋是（）

A.太平洋

B.大西洋

C.印度洋

D.北冰洋