Đặt một điện áp u = U₀cost vào hai đầu đoạn mạch chỉ có điện trở thuần. Gọi U là điện áp hiệu dụng giữa hai đầu đoạn mạch, i, I₀, I lần lượt là giá trị tức thời, giá trị cực đại và giá trị hiệu dụng của cường độ dòng điện trong mạch. Hệ thức nào sau đây đúng?  

Choose the word or phrase (A, B, C or D) that best fits the blank space in the following passage:

                                                                      THE PERFORMING ARTS

In the past, British children were frequently encouraged to try out their performing skills for the benefit of adults. They did this by reading aloud, acting or (31) _______ a musical instrument. As they grew up they were taken to public places of entertainment - the theatre, opera, circus or ballet. They looked forward to these (32) _______ with great excitement and would remember and discuss what they had seen for many weeks afterwards. But nowadays television and computers supply an endless stream of easily (33) _______ entertainment, and children quickly accept these marvelous inventions as a very ordinary part of their everyday lives. For many children, the sense of witnessing a very (34) _______ live performance is gone forever. But all is not lost. The presence of a TV set may have encouraged a very lazy response from (35) _______ in their own homes, but the desire of those with ambitions to become performing artists themselves does not seem to have been at all diminished. And live performances in public are still relatively popular, albeit with an older, more specialist audience. 

Question 32:

Choose the word or phrase (A, B, C or D) that best fits the blank space in the following passage:

                                                                      THE PERFORMING ARTS

In the past, British children were frequently encouraged to try out their performing skills for the benefit of adults. They did this by reading aloud, acting or (31) _______ a musical instrument. As they grew up they were taken to public places of entertainment - the theatre, opera, circus or ballet. They looked forward to these (32) _______ with great excitement and would remember and discuss what they had seen for many weeks afterwards. But nowadays television and computers supply an endless stream of easily (33) _______ entertainment, and children quickly accept these marvelous inventions as a very ordinary part of their everyday lives. For many children, the sense of witnessing a very (34) _______ live performance is gone forever. But all is not lost. The presence of a TV set may have encouraged a very lazy response from (35) _______ in their own homes, but the desire of those with ambitions to become performing artists themselves does not seem to have been at all diminished. And live performances in public are still relatively popular, albeit with an older, more specialist audience. 

Question 31:

Choose the word or phrase (A, B, C or D) that best fits the blank space in the following passage:

                                                                      THE PERFORMING ARTS

In the past, British children were frequently encouraged to try out their performing skills for the benefit of adults. They did this by reading aloud, acting or (31) _______ a musical instrument. As they grew up they were taken to public places of entertainment - the theatre, opera, circus or ballet. They looked forward to these (32) _______ with great excitement and would remember and discuss what they had seen for many weeks afterwards. But nowadays television and computers supply an endless stream of easily (33) _______ entertainment, and children quickly accept these marvelous inventions as a very ordinary part of their everyday lives. For many children, the sense of witnessing a very (34) _______ live performance is gone forever. But all is not lost. The presence of a TV set may have encouraged a very lazy response from (35) _______ in their own homes, but the desire of those with ambitions to become performing artists themselves does not seem to have been at all diminished. And live performances in public are still relatively popular, albeit with an older, more specialist audience. 

Question 34:  

Choose the word or phrase (A, B, C or D) that best fits the blank space in the following passage:

                                                                      THE PERFORMING ARTS

In the past, British children were frequently encouraged to try out their performing skills for the benefit of adults. They did this by reading aloud, acting or (31) _______ a musical instrument. As they grew up they were taken to public places of entertainment - the theatre, opera, circus or ballet. They looked forward to these (32) _______ with great excitement and would remember and discuss what they had seen for many weeks afterwards. But nowadays television and computers supply an endless stream of easily (33) _______ entertainment, and children quickly accept these marvelous inventions as a very ordinary part of their everyday lives. For many children, the sense of witnessing a very (34) _______ live performance is gone forever. But all is not lost. The presence of a TV set may have encouraged a very lazy response from (35) _______ in their own homes, but the desire of those with ambitions to become performing artists themselves does not seem to have been at all diminished. And live performances in public are still relatively popular, albeit with an older, more specialist audience. 

Question 33:  

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase thet best fits each of the numbered blanks from 24 to 28:

 Personal space is a term that refers (24)______the distance we like to keep between ourselves  and other people. When (25)______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 (26_______ . Some interesting (27)______ 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 (28)______ 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.  

Question 25:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase thet best fits each of the numbered blanks from 24 to 28:

 Personal space is a term that refers (24)______the distance we like to keep between ourselves  and other people. When (25)______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 (26_______ . Some interesting (27)______ 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 (28)______ 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.  

Question 26:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase thet best fits each of the numbered blanks from 24 to 28:

 Personal space is a term that refers (24)______the distance we like to keep between ourselves  and other people. When (25)______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 (26_______ . Some interesting (27)______ 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 (28)______ 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.  

Question 24:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase thet best fits each of the numbered blanks from 24 to 28:

 Personal space is a term that refers (24)______the distance we like to keep between ourselves  and other people. When (25)______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 (26_______ . Some interesting (27)______ 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 (28)______ 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.  

Question 27:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase thet best fits each of the numbered blanks from 24 to 28:

 Personal space is a term that refers (24)______the distance we like to keep between ourselves  and other people. When (25)______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 (26_______ . Some interesting (27)______ 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 (28)______ 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.  

Question 28:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase thet best fits each of the numbered blanks from 24 to 28:

 According to the European Pizza-Makers’ Association, making a good pizza is not a straight forward skill to learn. The ingredients seem very (24) _______: flour, yeast, water and a bit of salt. But water and flour can easily make glue and anyone who has eaten a (25) _______ quality pizza will know how bad it can make your stomach feel. “In Italy, 70% of pizza makers could improve on their product, not to (26) _______ all the pizza makers around the world who serve uneatable meals”, says Antonio Primiceri, the Association's founder. He has now started a pizza school in an attempt to save the reputation of this traditional dish. As part of a/ an (27) _______ course, the students at Mr Primiceri's school are taught to avoid common mistakes, produce a good basic mixture, add a tasty topping and cook the pizza properly. Test the finished pizza by breaking the crust, advises Mr Primiceri: “If the soft part inside the pizza is white, clean and dry, it's a good pizza. If it is not like this, the pizza will upset your stomach. You will feel (28) _______ full and also thirsty”. In Italy alone, the pizza industry has an annual turnover of more than $12 billion. Mr Primiceri estimated that there are 10,000 jobs in pizza restaurants waiting to be filled by those with real skills. “If you are a good pizza cook, you will never be without a job”, he says.

Question 24: