Tên gọi của hình trên đây là:

A. Đoạn thẳng

B. Đường thẳng

C. Đường gấp khúc

D. Tam giác 

Cho sơ đồ sau: A x e t i l e n → + H 2 , P d , t o X 1 → d d    K M n O 4 X 2 → C u O , t o  anđehit X₃. CTPT của X₃ là

A. C₂H₄O.  

B. CH₂O.    

C. C₂H₂O₂.  

D. C₃H₆O

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 below.

     Because writing has become so important in our culture, we sometimes think of it as more real than speech. A little thought, however, will show why speech is primary and writing secondary to language. Human beings have been writing (as far as we can tell from surviving evidence) for at least 5000 years; but they have been talking for much longer, doubtless ever since there have been human beings.

     When writing did develop, it was derived from and represented speech, although imperfectly. Even today there are spoken languages that have no written form. Furthermore, we all learn to talk well before we learn to write; any human child who is not severely handicapped physically or mentally will learn to talk. a normal human being cannot be prevented from doing so. On the other hand, it takes a special effort to learn to write. In the past many intelligent and useful members of society did not acquire the skill, and even today many who speak languages with writing systems never learn to read or write, while some who learn the rudiments of those skills do so only imperfectly.

     To affirm the primacy of speech over writing is not, however, to disparage the latter. One advantage writing has over speech is that it is more permanent and makes possible the records that any civilization must have. Thus, if speaking makes us human, writing makes us civilized.

The passage indicates that Harvard is _______________.

A. one of the oldest universities in the world

B. the oldest university in the world

C. one of the oldest universities in America

D. the oldest university in America

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

Keeping your distance

Personal space is a term that refers (23) ………. the distance we like to keep between ourselves and other people. When (24) …………. we do not know well gets too close we usually begin to feel uncomfortable. If a business colleague comes closer than 1.2 meters, the most common response is to move (25) ………. Some interesting (26) ……….. have been done in libraries. If strangers come too close, many people get up and leave the building; others use different methods such as turning their back on the intruder. Living in cities has made people develop new skills for dealing with situations where they are very close to strangers. Most people on crowded trains try not to look at strangers; they avoid skin contact, and apologize if hands touch by mistake. People use newspapers (27) …….. a barrier between themselves and other people, and if they do not have one, they stare into the distance, making sure they are not looking into anyone’s eyes.

Điền vào ô số 27

A. like

B. alike

C. as 

D. such as 

Cho 12,5 hỗn hợp các kim loại: Al, Cu và Mg t/d với dd HCl (dư). P.ư xong thu được 10,08 l H2 (đktc) và 3,5 chất rắn ko tan. Tính thành phần % k/l các kim loại trong hỗn hợp?

Read the following passage on transport, 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.

Quite different from storm surges are the giant sea waves called tsunamis, which derive their name from the Japanese expression for “high water in a harbor.” These waves are also referred to by the general public as tidal waves, although they have relatively little to do with tides. Scientists often referred to them as seismic sea waves, far more appropriate in that they do result from undersea seismic activity.

Tsunamis are caused when the sea bottom suddenly moves, during an underwater earthquake or volcano for example, and the water above the moving earth is suddenly displaced. This sudden shift of water sets off a series of waves. These waves can travel great distances at speeds close to 700 kilometers per hour. In the open ocean, tsunamis have little noticeable amplitude, often no more than one or two meters. It is when they hit the shallow waters near the coast that they increase in height, possibly up to 40 meters.

Tsunamis often occur in the Pacific because the Pacific is an area of heavy seismic activity. Two areas of the Pacific well accustomed to the threat of tsunamis are Japan and Hawaii. Because the seismic activity that causes tsunamis in Japan often occurs on the ocean bottom quite close to the islands, the tsunamis that hit Japan often come with little warning and can, therefore, prove disastrous. Most of the tsunamis that hit the Hawaiian Islands, however, originate thousands of miles away near the coast of Alaska, so these tsunamis have a much greater distance to travel and the inhabitants of Hawaii generally have time for warning of their imminent arrival.

Tsunamis are certainly not limited to Japan and Hawaii. In 1755, Europe experienced a calamitous tsunami, when movement along the fault lines near the Azores caused a massive tsunami to sweep onto the Portuguese coast and flood the heavily populated area around Lisbon. The greatest tsunami on record occurred on the other side of the world in 1883 when the Krakatoa volcano underwent a massive explosion, sending waves more than 30 meters high onto nearby Indonesian islands; the tsunami from this volcano actually traveled around the world and was witnessed as far away as the English Channel.

The word “displaced” in line 6 is closet in meaning to _____.

A. located 

B. moved 

C. filtered 

D. not pleased

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position ofprimary stress in each of the following questions

A. criteria 

B. mechanize

C. industry  

D. elephant 

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

“How brave you are!” he said to the firemen.

A. He asked how brave the firemen were

B. He blamed the firemen for their discouragement

C. He criticized the firemen for their discouragement

D. He praised the firemen for their courage