2岁男孩，因智能低下查染色体核型为46，XY，－14，+t（14q21q），查其母为

同学们知道，将两个金属电极插入任何一个水果中就可以做成一个水果电池，但日常生活中我们很少用“水果电池”，这是为什么呢？某学习小组的同学准备就此问题进行探究。

（1）同学们通过查阅资料知道将锌、铜两电极插入水果中，电动势大约会有1伏多一点。甲同学找来了一个土豆做实验，当用量程为0～3V、内阻约50kΩ的电压表测其两极时读数为0.96V，但当他将四个这样的水果电池串起来给标称值为“3V，0.5A”的小灯泡供电时，灯泡并不发光，检查灯泡、线路均无故障。据你猜想，出现这种现象的原因是：_______________________________________。（不要求写分析、推导过程）

（2）乙同学用灵敏电流表直接接“土豆电池”的两极，测得电流为0.32mA，根据前面电压表测得的0.96V电压，估算出“土豆电池”的内阻值，其值为_____________Ω。

（3）为了更准确测定一个“土豆电池”的电动势和内阻，实验室提供了以下一些器材可供选择：

A．电流表A₁（量程为0～0 6A，内阻r₁=1Ω）

B．灵敏电流表A₂（量程为0～0.6mA，内阻r=800Ω）

C．灵敏电流表A₃（量程为0～250μA，内阻未知）

D．滑动变阻器R（最大阻值约10Ω）

E．定值电阻R₀（阻值2kΩ）

F．变阻箱R′（0～9999Ω）

G．开关S和导线若干

①为了能尽可能准确测定“土豆电池”的电动势和内阻，实验中除了带有锌、铜两电极的水果电池外，还应选择的器材是_____________（填器材前的字母代号）；

②利用①问中选择的器材，在方框中画出测量的电路图（图中要标明相关器材的字母代号）。

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

乳腺导管内癌在肉眼和组织变化上有哪些特点?为何又称为粉刺性管内癌?

有关结节病描述，错误的是

A．淋巴结可呈蛋壳样钙化
B．肿大淋巴结不压迫周围血管
C．纵隔淋巴结肿大而肺门淋巴结不大者多见
D．肺门淋巴结对称性肿大
E．激素治疗效果好

园林树木的抗盐碱能力，一般来说针叶树不若阔叶树。