Cho ba chữ số 0; 1; 2. Hãy viết tất cả các số thâp phân từ 3 số đã cho sao cho mỗi chữ số xuất hiện trong cách viết đúng một lần.

Cho hình chóp S.ABCD có đáy ABCD là hình chữ nhật. Cạnh SA vuông góc với đáy A B = a , A D = a 2 , S A = a 3 . Số đo của góc giữa SC và mặt phẳng (ABCD) bằng

A. 60 0

B.  45 0

C.  30 0

D.  75 0

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

To many people, their friends are the most important things in their life. Really good friends (31)___ the good times and the bad times, help you when you have got problems and never turn their backs on you. Your best friend may be someone you have known all your life, someone you have grown up with and been through lots of (32) and downs with.

There are all sorts of things that can bring about this special relationship. It may be the result of enjoying the same activities, having the outlook on life or sharing (33) experiences. Most of us have met someone that we have immediately felt relaxed with as if we had known them for years. (34)_______, it really takes you years to get to know someone well enough to consider your best friend.

To the majority of us, this is someone we trust completely and who understands us better (35)______ anyone else. It is the person you can turn to for impartial advice and a shoulder to cry on when life gets you down.

Question 32:

A. ups

B. towards

C. forwards

D. backwards

Neil Armstrong and Buzz Aldrin planted an American flag on the moon. They spoke to President Richard Nixon after that.

→ Before Neil Armstrong and Buzz Aldrin ___________________________

Hãy chỉ ra cặp nghiệm khác 0 của hệ phương trình  x 2 = 5 x - 2 y y 2 = 5 y - 2 x

A. (3; 3)

B. (2; 2); (3; 1); (-3; 6)

C. (1; 1); (2; 2); (3; 3)

D. (-2; -2); (1; -2); (-6; 3)