在体内合成胆固醇的直接原料是A．丙酮酸 B．草酸 C．苹果酸 D．乙酰CoA E．a

关于早期绒毛活检，下列哪项不正确

A．可用于染色体检查

B．绒毛活检的最佳时间是孕6～9周

C．绒毛可用于分析胎儿的遗传特征

D．早孕绒毛活检均严重影响胎儿发育

E．早孕绒毛活检可能导致流产

III. 阅读(共两节，满分30分)

第一节阅读理解(共10小题；每小题2分，满分20分)

阅读下列短文，从每题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。

Charles Dickens (1812-1870), the great nineteenth century English novelist, was born near Portsmouth. His father ran heavily into debt and when he was twelve, he had to go and work in a factory for making boot polish. The only formal education he received was a two-year schooling at a school for poor children. In fact, he had to teach himself all he knew. He worked for a time as a junior clerk in a lawyer’s office. After that, he worked as a reporter in the law courts, and later in Parliament, for London newspapers.

His career as a writer of fiction began in 1833 with short stories and essays in periodicals(期刊), and in 1837 his comic novel The Pickwick Papers made him the most popular author at his time in England.

He was a great observer of people and their places because he was attracted by life and conditions in mid-nineteenth century London. He wrote 19 novels all his life and in many of them, Dickens gave a realistic picture of all classes of England society, showing deep sympathy for the poor and unfortunate, exposing the injustice and inhumanity of the middle class. Many of his novels like Oliver Twist, David Copperfield, Nicholas Nickleby, Great Expectations, A Tale of Two Cities and so on drew attention to the unsatisfactory social conditions that existed in England over a hundred years ago. Dickens criticized capitalist society from the point of view of bourgeois humanism. He wished to see improvement in the living conditions of the poor, but failed to find any effective means to achieve that end.

46. Dickens only received a little formal education because______.

A. he wanted to teach himself

B. he wanted to work and made a lot of money

C. he was too poor to afford any more formal education

D. he wanted some working experiences to be a novelist

47. According to Dickens, society at his time in England was________.

A. just    B. poor   C. comfortable      D. unsatisfying

48. Which of the following novel made Dickens the most popular writer at his time in England?

A. Oliver Twist                  B. The Pickwick Papers 

C. A Tale of Two Cities       D. Great Expectations

49. According to the passage, which of the following about Dickens is true?

A. He didn’t go to school at all.

B. He only wrote about poor people and showed deep sympathy for them.

C. He began to write fictions when he was 21 years old.

D. He found some effective ways to improve the living conditions of the poor.

50. It can be inferred from the passage that________.

A. Dickens had a miserable（悲惨的;可怜的）childhood

B. His career as a writer of fiction began in 1833

C. Dickens wrote many novels but only some of them are popular

D. Dickens criticized capitalist society and helped to improve the living conditions of the poor

下列不影响胃癌预后的因素是（）

A.病理类型

B.性别

C.年龄及身体状况

D.有无转移

E.肿瘤大小及生长方式