Theo định luật khúc xạ thì

A. ta khúc xạ và tia tới nằm trong cùng một mặt phẳng.

B. góc khúc xạ bao giờ cũng khác 0.

C. góc tới tăng bao nhiêu lẩn thì góc khúc xạ tăng bấy nhiêu lần.

D. góc tới luôn luôn lớn hơn góc khúc xạ.

Este X được tạo bởi từ một axit cacboxylic hai chức và hai ancol đơn chức. Đốt cháy hoàn toàn X luôn thu được CO₂ có số mol bằng với số mol O₂ đã phản ứng và  m C O 2 : m H 2 O = 77 : 18  Thực hiện sơ đồ phản ứng sau (đúng với tỉ lệ mol các chất).

(1) X + 2H₂ → N i ,   t o Y;                                                                   

(2) X + 2NaOH  →   t o  Z + X₁ + X₂

Biết rằng X₁ và X₂ thuộc cùng dãy đồng đẳng. Cho các phát biểu sau:

(a) X, Y đều có mạch không phân nhánh.                                        

(b) Z có đồng phân hình học

(c) X₁, X₂ thuộc cùng dãy đồng đẳng            

(d) X có công thức phân tử là C₇H₈O₄.

Số các phát biểu đúng là:

A. 1.

B. 0.

C. 2.

D. 3.

Mark the letter A, B, C or D on your answer sheet to indicate the word that is CLOSEST in meaning to the underlined part in the following sentence.

Reaching 35 and obviously aging, Jane has to make up her mind on her future very soon.

A. give a thought about

B. Pay attention to

C. prepare a plan for

D. make a decision on

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 31 to 35.

English has without a (31) ____ become the second language of Europe and the world. European countries which have most (32) ____ assimilated English into daily life are England's neighbors in Northern Europe: Ireland, the Netherlands, Sweden, Norway, and the rest of Scandinavia. 

The situation is so (33) ____ that any visitor to the Netherlands will soon be aware of the pressure of English on daily life: television, radio and print bring it into every home and the schoolyard conversation of children; advertisers use it to (34) ____ up their message, journalists take refuge in it when their home-bred skills fail them. Increasingly one hears the (35) ____ that Dutch will give way to English as the national tongue within two or three generations

Điền ô số 34

A. life

B. energy

C. pep

D. enthusiasm

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

Ever since it was first possible to make a real robot, people have been hoping for the invention of a machine that would do all the necessary jobs around the house. If boring and repetitive factory work could be (31)__________ by robots, why not boring and repetitive household chores too? For a long time the only people who really gave the problem their attention were amateur inventors And they came up against a major difficulty. That is, housework is (32)__________very complex. It has never been one job it has always been many. A factor robot carries (33)__________one task endlessly until it is reprogrammed to do something else. It doesn’t run the whole factory. A housework robot on the other hand, has to do several different types of cleaning and carrying jobs and also has to cope with all the different shapes and positions of rooms, furniture, ornaments, cats and dogs.

 (34)__________, there have been some developments recently. Sensors are available to help the robot locate objects and avoid obstacles. We have the technology to produce the hardware. All that is missing the software- the programs (35)__________will operate the machine

Điền ô số 31

A. managed

B. made

C. succeeded

D. given

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 31 to 35.

English has without a (31) ____ become the second language of Europe and the world. European countries which have most (32) ____ assimilated English into daily life are England's neighbors in Northern Europe: Ireland, the Netherlands, Sweden, Norway, and the rest of Scandinavia. 

The situation is so (33) ____ that any visitor to the Netherlands will soon be aware of the pressure of English on daily life: television, radio and print bring it into every home and the schoolyard conversation of children; advertisers use it to (34) ____ up their message, journalists take refuge in it when their home-bred skills fail them. Increasingly one hears the (35) ____ that Dutch will give way to English as the national tongue within two or three generations.

Điền ô số 33

A. plain

B. open

C. blatant

D. marked

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

It took Ted a long time to get _____the breakup of his marriage

A. across 

B. over 

C. through 

D. along with

Cho 21,9 gam amin đơn chức X phản ứng hoàn toàn với dung dịch  FeCl 3  (dư), thu được 10,7 gam kết tủa. Số đồng phân cấu tạo bậc 1 của X là:

A. 5

B. 8

C. 7

D. 4

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Jack went to a party, wearing a _____ bow tie.

A. lovely red woolen 

B. red lovely woolen 

C. woolen red lovely 

D. lovely woolen red