Choose the letter A, B, C or D the word that has the underlined part different from others.

A. government

B. comfortable

C. company

D. remote

Cho phương trình a x 2 + b x + c =   0   ( a ≠ 0 ) có biệt thức ∆ = b 2   –   4 a c   >   0 , khi đó, phương trình có hai nghiệm là:

A.  x 1   =   x 2   = − b 2 a

B.  x 1 = b + Δ 2 a ;   x 2   = b − Δ 2 a

C.  x 1 = − b + Δ 2 a ;   x 2   = − b − Δ 2 a

D. x 1 = − b + Δ a ;   x 2   = − b − Δ a

Khi lắp mạch điện hai công tắc hai cực điều khiển hai đèn, người ta tiến hành vạch dấu những vị trí nào?

A. Vị trí lắp đặt thiết bị

B. Vị trí lắp đặt đèn

C. Đường đi dây

D. Cả 3 đáp án trên

Choose the letter A, B, C or D to answer these following questions

“The Beauty and the Beast” is a heartfelt story about true love which transforms the Beast into a prince. The fairytale starts with a young girl who lived with her father and two sisters. They lived a good life in a big house but due to some unfortunate turn of events her father lost all his money. They were forced to move into a smaller house. The two sisters kept on grieving for their former life and Beauty kept her sadness for herself and tried her best to help her family.

One day the father found out there is a slight chance he could get back a part of his fortune when one of the ships got back. The two sisters demanded all sorts of thing but Beauty just wanted a single rose. On his way home, the father got lost and wandered into the Beast’s castle. The Beast let him go under the condition of him sending one of his daughters to the castle.

Beauty’s life in the castle was pleasant. She had her room and she was served. Unhappy about his appearance, the Beast never appeared. Beauty only heard his voice. As time passed by they started to love each other. One day, the Beast let her go home to look after her sick father. While she was taking care of her father, she had a dream about Beast dying. When she came back to the palace she found the Beast ill in his bed. She didn’t want him to die and she told him she’ll marry him.

Beast disappeared all of the sudden and its place was taken by a beautiful prince. He told her all about a fairy enchanting him and how the spell could have only been broken by a girl falling in love with him. After her father got better, they threw a wedding and then they all lived happily ever after.

How was Beauty’s life in the castle?

A. unhappy

B. worried

C. pleasant

D. angry

Em hãy đổi 34 ° C, 65 ° C, 40 ° C, 690 ° C ra  ° F

Cho X, Y là hai axit hữu cơ mạch hở (M_X < M_Y); Z là ancol no; T là este hai chức mạch hở không phân nhánh tạo bởi X, Y, Z. Đun nóng 38,86 gam hỗn hợp E chứa X, Y, Z, T với 400 ml dung dịch NaOH 1M vừa đủ thu được ancol Z và hỗn hợp F chứa hai muối có số mol bằng nhau. Cho Z vào bình chứa Na dư thấy bình tăng 19,24 gam và thu được 5,824 lít H₂ ở đktc. Đốt hoàn toàn hỗn hợp F cần 15,68 lít O₂ (đktc) thu được khí CO₂, Na₂CO₃ và 7,2 gam H₂O. Thành phần phần trăm khối lượng của T trong E gần với giá trị nào nhất?

A. 9%                  

B. 26%                 

C. 51%                 

D. 14%

Cho tam goác DEF và tam giác MNP có DE=MN, E ^ = N ^ , EF=NP, biết D ^ = 100 o . Số đo góc M là :

A. 70 °

B. 80 °

C. 90 °

F. 100 °