There have been a series of thefts of property and money in Jane’s school, and various things seem to have disappeared Nobody has admitted to the crime, so the police have been called in. They are investigating the problem, but so far nobody  has been arrested for the crime.

     One day Jane came to see her best friend, Ann. She was out, and her mother asked Jane to wait in her room. As Jane waited for her to come home, she started to look around, and decided to have a look at some of her books. Jane came across a calculator which has taken from school a week ago

     Jane doesn’t know what to do. She doesn’t want to lose a friend. She doesn’t want to break up her family- Ann already has enough trouble with her dad. On the other hand, theft is a serious crime, and the police are involved. If she ignores it, she will disappoint her other school friends. If she tells the police, she will be drawn in . What would you do if you were Jane?

1. What is the problem in Jane’s school?

A.  Many students have disappeared.                     

B.   There have been lots of thieves in the school

C.   Lots of things and money have been stolen       

D.  The police have been questioning people

2. It can be inferred from the text that

A.  Nobody has been found guilty of the crime         

B.   The police have arrested somebody

C.   someone has admitted stealing these things         

D.  The police are trying to find out what the problem is

3. According to the passage , which of the following is true?

A.  Jane and Ann are good friend                               

B.   Jane was not home when Ann came to see her

C.   Jane found a stolen object in Ann’s room             

D.  Both A and C 

4. Which of the following is not mentioned as being stolen from school?

A. Property               B. Thefts              C. Money                     D. a calculator

5. Which of the following can not be inferred from the passage?

A.  Jane finds it hard to decide what to do                  

B.   Ann and her dad don’t get on very well

C.   Jane won’t tell the police about what Ann has done      

D.   Theft is considered a serious crime  

(1) NH₄⁺ tác dụng với OH^- tạo thành khí NH₃

(3) Ag⁺ tác dụng với Cl^- tạo kết tủa AgCl  

(5) Ba²⁺ tác dụng với SO₄^2- tạo kết tủa BaSO₄

₍₆₎ Mg²⁺ tác dụng với OH^- tạo kết tủa Mg(OH)₂

(7) OH^- tác dụng với HCO₃^- tạo thành khí CO2

n_HNO3= C_M.V_dd= 0,01.0,05= 5.10^-4(mol)

n_NaNO3= C_M.V_dd= 0,015.0,1=1,5.10^-3(mol)

HNO₃   -->    H⁺      +    NO₃^-

5.10^-4           5.10^-4        5.10^-4    (mol)

NaNO₃   -->    Na⁺      +    NO₃^-

1,5.10^-3         1,5.10^-3       1,5.10^-4    (mol)

 [H⁺]= n/V_dd= 5.10^-4/0,15=3,33.10^-3M

 [Na⁺]= n/V_dd= 1,5.10^-3/0,15=0,01M

 [NO₃^-]= n/V_dd= 2.10^-3/0,15=0,013M

MgCl₂ + 2NaOH --> Mg(OH)₂ + 2NaCl

1. D. hour

2. A. iron

3. C. which

4. C. birthday

5. B. divorce

B. Choose the word whose main stress is differently from the others:

1. D. divorce

2. B. together

3. B. anniversary

4. D. receive

5. A. begin

Câu 1: Yếu tố không gian, thời gian góp phần thể hiện tâm trạng của nhân vật trữ tình như thế nào? Con người đã có những hành động gì để giải tỏa những cảm xúc đó?

Câu 2:  Xuân Hương dám thách thức duyên phận, gắng gượng vươn lên nhưng rốt cuộc vẫn rơi vào bi kịch. Em có đồng tình với ý kiến trên không? Vì sao?

So sánh những điểm giống và khác nhau giữ Nhật và Xiêm giữa TKXIX đầu TKXX theo các nội dung sau: bối cảnh, biện pháp, nội dung biện pháp, kết quả, tính chất.