Điểm giống nhau giữa Al và Cr là

A. cùng tác dụng với HCl tạo ra muối có mức oxi hóa là +3

B. cùng tác dụng với dung dịch NaOH dư tạo ra chất  Na M OH 4 .

C. cùng tác dụng với khí clo tạo ra muối có dạng  MCl 3

D. cùng bị thụ động trong dung dịch nước cường toan

Chứng minh rằng G = 8 8 + 2 20 ⋮ 17

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 from 23 to 27.

A worrying question which requires global attention is severe overpopulation and its drastic effects in the countries of the Third World. In regions where the birth rate is extremely high, poverty and starvation are (23) _________. In India, there is an average of thirty five infants being bom every minute, yet the most shocking figures are those which (24) ________ the enormous number of the victims of famine in certain African territories. Communities afflicted with acute destitution are additionally confronted with illiteracy, life in appalling conditions and infectious diseases (25) __________ the indigenous populations. There is an urgent need for these problems to be solved. Unless measures are taken to ease the suffering of the impoverished underdeveloped nations, desperate crowds of immigrants will (26)____ in flooding the richer states in search of a brighter future. It’s the most challenging task for the international giants nowadays to help the poor populations get out of the poverty (27) ________ .

Điền vào ô 23.

A. profuse

B. rife

C. generous

D. predominant

Vẽ các tia Ox, Oy, Oz trong đó hai tia Ox và Oy đối nhau. Gọi A là điểm nằm bên trong góc xOz. Vẽ tia OA. Trong hình vẽ có những góc nào?

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 from 38 to 42.

        The popular image of student life is of young people with few responsibilities enjoying themselves and (38) _____ very little work. This is often not true. Many older people now study at college or university, sometimes (39) _____ a part-time basis while having a job and looking after a family. These students are often highly motivated and work very hard.

        Younger students are often thought to be lazy and careless about money (40) _____ this situation is changing. In Britain reduced government support for higher education means that students can no longer rely on having their expenses paid for them. Formerly, students received a grant towards their living expenses. Now most can only get a loan (41) _____ has to be paid back. Since 1999 they have paid over £1,000 towards tuition fees and this amount will increase up to a maximum of £3,000. In the US students already have to pay for tuition and room and board.

  Many get a financial aid package which may include grants, scholarships and loans. The fear of having large debts places (42) _____ pressure on students and many take part-time jobs during the term and work full-time in the vacations.

Điền vào ô 42

A. considerable 

B. generous

C. magnificent

D. considerate

Thực hiện các phép tính sau

Chất rắn nào sau đây có màu đỏ nâu

A. Fe  

B.  Fe 2 O 3

C.  Cu OH 2      

D.  Fe OH 2

Không tính kết quả, hãy so sánh: (-3). (-57) với (-34).6

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair sentences in the following questions.

Beef contains vitamins. Generally, fish contains almost the same vitamins as beef.

A. The vitamins content of beef is generally considered to come from fish.

B. The vitamins content of fish may be considered in general as similar to beef.

C. Generally, beef and fish may be considered to be a combination of vitamin content.

D. What vitamin fish contains may be considered in general to be made from beef.

Xét 5 đoạn thẳng AB, AD, AC, BD, DC trên hình vẽ và trả lời các câu hỏi.

Đường thẳng m không cắt đoạn thẳng nào?