Điền nội dung thích hợp vào bảng 54.2 những chất thải rắn gây ô nhiễm mà em thường gặp quanh nơi ở hoặc trên đường tới trường:

Khi cho lai hai cơ thể bố mẹ thuần chủng khác nhau bởi 2 cặp tính trạng tương phản F₁ đồng tính biểu hiện tính trạng của một bên bố hặc mẹ, tiếp tục cho F₁ tự thụ phấn, F₂ thu được tỉ lệ kiểu hình 1 : 2 : 1, hai tính trạng đó di truyền:

A. Độc lập.

B. Liên kết không hoàn toàn.

C. Liên kết hoàn toàn.

D. Tương tác gen.

Read the following passage and mark the letter A, B, C, or 0 on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.

Every summer, when the results of university entrance exam come out, many newspaper stories are published about students who are top-scorers across the country. Most portray students as hard-working, studious, smart and, generally, from low-income families. They are often considered heroes or heroines by their families, communes, villages and communities, And they symbolise the efforts made to lift them, and their relatives, out of poverty. The students are often too poor to attend any extra-classes, which make their achievements more illustrious and more newsworthy. While everyone should applaud the students for their admirable efforts, putting too much emphasis on success generates some difficult questions.

If other students look up to them as models, of course it's great. However, in a way, it contributes to society's attitude that getting into university is the only way to succeed. For those who fail, their lives are over. It should be noted that about 1.3 million high school students take part in the annual university entrance exams and only about 300,000 of them pass. What's about the hundreds of thousands who fail? Should we demand more stories about those who fail the exam but succeed in life or about those who quit university education at some level and do something else unconventional?

"I personally think that it's not about you scoring top in an entrance exam or get even into Harvard. It's about what you do for the rest of your life," said Tran Nguyen Le Van, 29. He is the founder of a website, vexere.com, that passengers can use to book bus tickets online and receive tickets via SMS. His business also arranges online tickets via mobile phones and email. Van dropped out of his MBA at the Thunderbird School of Global Management in Arizona in the United States. His story has caught the attention of many newspapers and he believes more coverage should be given to the youngsters who can be role-models in the start-up community. Getting into university, even with honours, is just the beginning. We applaud them and their efforts and obviously that can give them motivation to do better in life. However, success requires more than just scores," Van said. Van once told a newspaper that his inspiration also came from among the world's most famous drop-outs, such as Mark Zuckerberg of Facebook or Bill Gates who also dropped out of Harvard University.

Alarming statistics about unemployment continues to plague us. As many as 162,000 people with some kind of degree cannot find work, according to Labour Ministry's statistics this month. An emphasis on getting into university does not inspire students who want to try alternative options. At the same time, the Ministry of Education and Training is still pondering on how to reform our exam system, which emphasises theories, but offers little to develop critical thinking or practice. Vu Thi Phuong Anh, former head of the Centre for Education Testing and Quality Assessment at Vietnam National University in Ho Chi Minh City said the media should also monitor student successes after graduation. She agreed there were many success stories about young people, but added that it was imbalanced if students taking unconventional paths were not also encouraged.

Vietnam is, more than ever, in desperate need of those who think outside the box. Time for us to recognise talent, no matter where it comes from or how.

Question 49: According to the fourth paragraph, what is TRUE about the modern exam system?

A. It puts too much pressure on students who must get a place in a university.

B. Students are not encouraged to do something different.

C. The government is trying to change the theories of exam.

D. Many stories about successful students cannot inspire those who attend universities.

Hãy tìm thêm một số ví dụ về đột biến gen phát sinh trong tự nhiên hoặc do con người tạo ra.

Tiến hành các thí nghiệm sau:

(a) Cho lá hợp kim Fe-Cu vào dung dịch H₂SO₄ loãng.

(b) Cho lá Cu vào dung dịch AgNO₃.

(c) Cho lá Zn vào dung dịch HNO₃ loãng.

(d) Đốt dây Mg trong bình đựng khí clo.

Số thí nghiệm có xảy ra ăn mòn hóa học là

A. 3

B. 1

C. 4

D. 2

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

By the time you come here tomorrow, the work ___________.

A. will have been finishing

B. will be finishing

C. will have been finished

D. will be finished

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 35 to 42.

        It may seem as if the art of music by its nature would not lend itself to the exploration and expression of reality characteristic of Romanticism, but that is not so. True, music does not tell stories or paint pictures, but it stirs feelings and evokes moods, through both of which various kinds of reality can be suggested or expressed. It was in the rationalist 18"¹ century that musicians rather mechanically attempted to reproduce stories and subjects in sound. These literal renderings naturally tailed, and the Romanticists profited from the error. Their discovery of new realms of experience proved communicable in the first place because they were in touch with the spirit of renovation, particularly through poetry. What Goethe meant to Beethoven and Berlioz and what Gennan folk tales and contemporary lyricists meant to Weber, Schumann, and Schubert are familiar to all who are acquainted with the music of these men.

        There is, of course, no way to demonstrate that Beethoven’s Egrnont music or, indeed, its overture alone corresponds to Goethe’s drama and thereby enlarges the hearer’s consciousness of it; but it cannot be an accident or an aberration that the greatest composers of the period employed the resources of their art for the creation of works expressly related to such lyrical and dramatic subjects. Similarly, the love of nature stirred Beethoven, Weber, and Berlioz, and here too the correspondence is felt and persuades the fit listener that his own experience is being expanded. The words of-the creators themselves record this new comprehensiveness. Beethoven referred to his activity of mingled contemplation and composition as dichten, making a poem; and Berlioz tells in his Memoires of the impetus given to his genius by the music of Beethoven and Weber, by the poetry of Goethe and Shakespeare, and not least by the spectacle of nature. Nor did the public that ultimately understood their works gainsay their claims.

                   It must be added that the Romantic musicians including Chopin, Mendelssohn, Glinka, and Liszt-had at their disposal greatly improved instruments. The beginning of the 19th century produced the modem piano, of greater range and dynamics than theretfore, and made all wind instruments more exact and powerful by the use of keys and valves. The modem full orchestra was the result. Berlioz, whose classic treatise on instrumentation and orchestration helped to give it definitive form, was also the first to exploit its resources to the full, in the Symphonic fantastique of 1830. This work, besides its technical significance just mentioned, can also be regarded as uniting the characteristics of Romanticism in music, it is both lyrical and dramatic, and, although it makes use of a “story,” that use is not to describe the scenes but to connect them; its slow movement is a “nature poem” in the Beethovenian manner; the second, fourth, and fifth movements include “realistic” detail of the most vivid kind; and the opening one is an introspective reverie.

Romanticism in music is characterized as being _________.

A. exact and powerful

B. realistic and vivid

C. great and dynamic 

D. lyrical and dramatic

Chất nào sau đây thuộc loại chất điện li yếu? 

A. CH₃COOH

B. KOH

C. HCl

D. NaCl