[说明]
有若干教师，每个教师只有姓名，一个教师可以指导多名研究生；每名研究生有姓名和研究方向，程序最后输出每个教师指导的所有研究生的姓名和研究方向。
[Java程序]
public class Teacher
String name;
int top=0;
Student[] student=new Student[20];
public Teacher（　）
public Teacher(String name) this.name=name;
boolean add(Student stu)
int len=this.student.length;
if (top＜len-1)
this.student[top]=siu;
(1) ;
return true;

else
return (2) ;

void disp（　）
System.out.println(“指导老师"”+this.name);
System.out.println(“研究生:”);
for(int i=0;i＜ (3) ;i++)
System.out.println(“姓名:”+this.student[i].name+“/t研究方向:”+this.student[i]. search);


public static void main(String[] args)
Teacher t[]=new Teacher(“李明”),new Teacher(“王华”);
Student s1 = new Student(“孙强”，“数据库”);
Student s2 = new Student(“陈文”，“软件工程”);
Student s3 = new Student(“章锐”，“计算机网络”);
if(! t[0].add(s1)) System.out.println(“每个老师最多只能指导20个学生!”);
if(! t[0].add(a2)) System.out.println(“每个老师最多只能指导20个学生!”);
if(! t[1].add(s3)) System.out.println(“每个老师最多只能指导20个学生!”);
for(int i=0;i＜2;i++)
(4) ;
class (5)
String name;
String search;
public Student（　）
public Student(String name,String search)
this.name=name;
this.search=search;

String getName（　）return this.name;
String getSearch（　）return this.search;

(1) top++及其等效形式 (2) false (3) top (4) t[i].disp() (5) Student

[说明] 有若干教师，每个教师只有姓名，一个教师可以指导多名研究生；每名研究生有姓名和研究方向，程序最后输出每个教师指导的所有研究生的姓名和研究方向。 [Java程序] public class Teacher { String name; int top=0; Student[] student=new Student[20]; public Teacher（　） {} public Teacher(String name) { this.name=name;} boolean add(Student stu){ int len=this.student.length; if (top＜len-1) { this.student[top]=siu; (1) ; return true; } else return (2) ; } void disp（　）{ System.out.println(“指导老师"”+this.name); System.out.println(“研究生:”); for(int i=0;i＜ (3) ;i++){ System.out.println(“姓名:”+this.student[i].name+“/t研究方向:”+this.student[i]. search); } } public static void main(String[] args){ Teacher t[]={new Teacher(“李明”),new Teacher(“王华”)}; Student s1 = new Student(“孙强”，“数据库”); Student s2 = new Student(“陈文”，“软件工程”); Student s3 = new Student(“章锐”，“计算机网络”); if(! t[0].add(s1)) {System.out.println(“每个老师最多只能指导20个学生!”);} if(! t[0].add(a2)) {System.out.println(“每个老师最多只能指导20个学生!”);} if(! t[1].add(s3)) {System.out.println(“每个老师最多只能指导20个学生!”);} for(int i=0;i＜2;i++) (4) ; } } class (5) { String name; String search; public Student（　）{} public Student(String name,String search){ this.name=name; this.search=search; } String getName（　）{return this.name;} String getSearch（　）{return this.search;} }

如图1所示，容器中间用隔板分成大小相同且互不相通的A，B两部分，隔板下部有一圆孔用薄橡皮膜封闭．橡皮膜两侧压强不相等时，会向压强小的一侧凸起．

（1）探究“液体压强与液体密度的关系”时，左右两边液体应满足要求　　 

（2）探究“液体压强与液体深度的关系”时，萌萌同学在A，B两侧倒入深度不同的水后，实验现象如图2所示．由该实验现象得出结论：在液体密度相同时，液体深度　　，液体压强越大．

（3）实验中在A、B两侧分别导入水和盐水，当橡皮膜相平时，两侧深度为10cm、12cm，则盐水的密度为         Kg/m³．

解：（1）探究“液体压强与液体密度的关系”时，应保持容器中A，B两侧液体的深度相同；

  （2）在液体密度相同时，液体深度越深，液体压强越大．

[6209af727033e403.png]

故答案为：（1）不同液体，深度相同；（2）越深；（3）．

某同学为了测定NaCl和MgCl2固体混合物中MgCl2的质量分数，进行如下实验：将80g固体混合物溶于水配成溶液，平均分成四份，分别加入相同质量分数的NaOH溶液，获得如表实验数据：

（1）表中m的值为　 　；问：

（2）原固体混合物中MgCl2的质量分数是多少？（要求写出计算过程）

解：（1）有图表中数据可知：加入20g氢氧化钠溶液质量得到沉淀2.9g，加入40g氢氧化钠溶液质量，正好是20g氢氧化钠溶液质量的2倍，所以生成沉淀也是2.9g的2倍，所以m值为：2.9g×2=5.8g

（2）解：设原固体混合物中MgCl2的质量为x，根据表中数据沉淀质量不再增加，说明已经反应完了，最多生成沉淀8.7g．

MgCl2+2NaOH═Mg（OH）2↓+2NaCl

95 58

x 8.7g

根据：[48929633814c2da6.png]解得：x=14.25g

原固体混合物中MgCl2的质量分数为：[47847fa0eba95ac6.png]=71.25%；

答：表中m的值为5.8；原固体混合物中MgCl2的质量分数是71.25%．

下列有关“物质﹣﹣性质﹣﹣用途”的叙述中，用途与性质不相关的是（　　）

A:A B:B C:C D:D

August 1990，Boston

Dear Maya Shao-ming,

To me, June 6, 1990 is a special day. My long-awaited dream came true the minute your father cried, "A girl!" You are more than just a second child, more than just a girl to match our boy. You, little daughter, are the link to our female line, the legacy of another woman's pain and sacrifice 31 years ago.

Let me tell you about your Chinese grandmother. Somewhere in Hong Kong, in the late fifties, a young waitress found herself pregnant (怀孕) by a cook, probably a co-worker at her restaurant. She carried the baby to term, suffered to give it birth, and kept the little girl for the first three months of her lifE. I like to think that my mother—your grandmother—loved me and fought to raise me on her own, but that the daily struggle was too harD. Worn down by the demands of the new baby and perhaps the constant threat of starvation, she made the painful decision to give away her girl so that both of us might have a chance for a better lifE.

More likely, I was dropped at the orphanage (M JLR) steps or somewhere elsE. I will probably never know the truth. Having a baby in her unmarried state would have brought shame on the family in China, so she probably kept my existence a secret. Once I was out of her life, it was as if I had never been born. And so you and your brother and I are the missing leaves on a family treE.

Do they ever wonder if we exist?

Before I was two, I was adopted by an Anglo couplE. Fed three square meals a day, I grew like a wild weed and grasped all the opportunities they had to offer—books, music, education, church life and community activities. In a family of blue-eyed blonds, though, I stood out like a sore thumB. Whether from jealousy or fear of someone who looked so different, my older brothers sometimes teased me about my unpleasing skin, or made fun of my clumsy walk. Moody and impatient, burdened by fears that none of us realized resulted from my early years of need, I was not an easy child to lovE. My mother and I conflicted countless times over the years, but gradually came to see one another as real human beings with faults and talents, and as women of strength in our own right. Lacking a mirror image in the mother who raised me, I had to seek my identity as a woman on my own. The Asian American community has helped me regain my double identity.

But part of me will always be missing: my beginnings, my personal history,all the delicate details that give a person her origin. Nevertheless, someone gave me a lucky name "Siu Wai." "Siu" means "little," and "War means "clever." Therefore, my baby name was "Clever little onE." Who chose those words? Who cared enough to note my arrival in the world?

I lost my Chinese name for 18 years. It was Americanized for convenience to "SuE." But like an ill-fitting coat, it made me uncomfortablE. I hated the namE. But even more, I hated being ChinesE. It took many years to become proud of my Asian origin and work up the courage to take back my birth-namE. That, plus a little knowledge of classroom Cantonese, is all the Chinese culture I have to offer you. Not white, certainly, but not really Asian, I try to pave the way between the two worlds and bridge the gap for you. Your name, "Shao-ming," is very much like mine—"Shao" means "littlE." And "ming" is "bright," as in a shining sun or moon. Whose lives will you brighten, little Maya? Your past is more complete than mine, and each day I cradle you in your babyhood, generously giving you the loving care I lacked for my first two years. When I pat you, I comfort the lost baby inside me who still cries for her mother.

Sweet Maya, it doesn't matter what you "become" later on. You have already fulfilled my wildest dreams.

I love you.

Mommy

55. Why is June 6, 1990 a special day for Mommy?

A. Her dream of being a mother came truE.

B. She found her origin from her Chinese mother.

C. She wrote the letter to her daughter.

D. Her female line was well linkeD.

56. How does Mommy feel about her being given away?

A. It is bitter and disappointing. B. It is painful but understandablE.

C. She feels sorry but sympathetiC. D. She feels hurt and angry.

57. What does “I stood out like a sore thumb” in Paragraph 5 mean?

A. I walked clumsily out of pains.

B. I was not easy to love due to jealousy.

C. I was impatient out of fear.

D. I looked different from others.

58. What can be inferred from Mommy’s Anglo family life?

A. She used to experience an identity crisis.

B. She fought against her American identity.

C. She forgot the pains of her early years.

D. She kept her love for Asia from childhooD.

59. Why did Mommy name her daughter “Shao-ming?”

A. To match her own birth-namE.

B. To brighten the lives of the family.

C. To identify her with Chinese origin.

D. To justify her pride in Chinese culturE.

60. By “Your past is more complete than mine,” Mommy means ________.

A. her past was completed earlier than Shao-ming’s

B. Shao-ming has got motherly care and a sense of roots

C. her mother didn’t comfort her the way she did Shao-ming

D. her past was spent brokenly, first in Asia, then in the US