Tìm x biết:

 a, (x-23)×7 = 49

    b, 25÷(x-56) = 5

Số dư của phép chia 35÷3 là:

A. 3

B. 2

C. 1

D. 0

Điền vào chỗ trống: cấu tạo hệ thống truyền lực phụ thuộc ......... của máy công tác và loại động cơ.

A. Yêu cầu

B. Nhiệm vụ

C. Điều kiện làm việc

D. Cả 3 đáp án trên

Pháp buộc vị vua nào kí Hiệp ước 1884, biến Cam-pu-chia thành thuộc địa của Pháp?

A. Giay-a-véc-man

B. Si-vô-tha

C. A-cha Xoa

D. Nô-rô-đôm

Xiêm là nước duy nhất ở Đông Nam Á giữ được nền độc lập tương đối về chính trị vào nửa sau thế kỉ XIX là do?

A. Đất nước bước sang thời kì tư bản chủ nghĩa

B. Được sự giúp đỡ và bảo hộ của Mĩ

C. Những cải cách về chính trị của vua Ra-ma IV

D. Chính sách ngoại giao mềm dẻo, khôn khéo của vua Ra-ma V

Cho dãy các polime sau: (1) poli(metyl metacrylat), (2) poliacrilonitrin, (3) nilon-6,6, (4) poli(etylen terephtalat). Các polime là sản phẩm của phản ứng trùng hợp là

A. (1) và (4).

B. (2) và (3).

C. (1) và (2).

D. (3) và (4).

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Cooperation is the common endeavor of two or more people to perform a task or reach a jointly cherished goal. Like competition and conflict, there are different forms of cooperation, based on group organization and attitudes.

In the first form, known as primary cooperation, group and individual fuse. The group contains nearly all of each individual’s life. The rewards of the group’s work are shared with each member. There is an interlocking identity of individual, group and task performed. Means and goals become one, for cooperation itself is valued.

While primary cooperation is most often characteristic of preliterature societies, secondary cooperation is characteristic of many modern societies. In secondary cooperation, individuals devote only part of their lives to the group. Cooperation itself is not a value. Most members of the group feel loyalty, but the welfare of the group is not the first consideration. Members perform tasks so that they can separately enjoy the fruits of their cooperation in the form of salary, prestige, or power. Business offices and professional athletic teams are examples of secondary cooperation.

In the third type, called tertiary cooperation or accommodation, latent conflict underlies the shared work. The attitudes of the cooperating parties are purely opportunistic: the organization is loose and fragile. Accommodation involves common means to achieve antagonistic goals: it breaks down when the common means cease to aid each party in reaching its goals. This is not, strictly speaking, cooperation at all, and hence the somewhat contradictory term antagonistic cooperation is sometimes used for this relationship.

Which of the following is NOT given as a name for the third type of cooperation?

A. Accommodation

B. Latent conflict

C. Tertiary cooperation

D. Antagonistic cooperation

Mark the letter A, B, C or D in your answer sheet to indicate the underlined part that needs correction in each of the following questions.

If he paid a little more attention to his accounting work in the first place, he wouldn’t be in the red now.

A. paid       

B. a little     

C. to  

D. wouldn’t be

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Since water is the basis of life, composing the greater part of the tissues of all living things, the crucial problem of desert animals is to survive in a world where sources of flowing water are rare. And since man’s inexorable necessity is to absorb large quantities of water at frequent intervals, he can scarcely comprehend that many creatures of the desert pass their entire lives without a single drop.

Uncompromising as it is, the desert has not eliminated life but only those forms unable to withstand its desiccating effects. No moist- skinned, water-loving animals can exist there. Few large animals are found. The giants of the North American desert are the deer, the coyote, and the bobcat. Since desert country is open, it holds more swift-footed running and leaping creatures than the tangled forest. Its population is largely

nocturnal, silent, filled with reticence, and ruled by stealth. Yet they are not emaciated.

Having adapted to their austere environment, they are as healthy as animals anywhere else in the word. The secret of their adjustment lies in the combination of behavior and physiology. None could survive if, like mad dogs and Englishmen, they went out in the midday sun; many would die in a matter of minutes. So most of them pass the burning hours asleep in cool, humid burrows underneath the ground, emerging to hunt only by night. The surface of the sun-baked desert averages around 150 degrees, but 18 inches down the temperature is only 60 degrees.

Man can hardly understand why many animals live their whole life in the desert, as

A. water is an essential part of his existence

B. very few large animals are found in the desert

B. very few large animals are found in the desert

D. water composes the greater part of the tissues of living things