Học sinh có những trách nhiệm gì trong việc xây dựng và bảo vệ hệ thống chính trị?

Trong tình huống dưới đây, học sinh nào đã thực hiện đúng quy định công dân bình đẳng về nghĩa vụ trước pháp luật?

"Năm nay C, T và K đều đủ 17 tuổi, đều thuộc diện đăng kí nghĩa vụ quân sự, theo quy định của Luật Nghĩa vụ quân sự. C và T đã thực hiện xong việc đăng kí, còn K thì không tới đăng kí cho rằng: bố của K là nhà kinh doanh thành đạt, đã nộp nhiều tiền thuế cho Nhà nước, nên K được miễn đăng kí tham gia nghĩa vụ quân sự".

Ở 1 loài thực vật, khi lai 2 dòng thuần chủng đều có hoa trắng thu được F₁ toàn hoa đỏ. Cho F₁ tự thụ phấn, thế hệ F₂ xuất hiện tỉ lệ 9 hoa đỏ : 7 hoa trắng. Có thể kết luận:

Phương trình \({\log _3}\left( {{x^2} - 3x - 5} \right) = {\log _3}x\) có bao nhiêu nghiệm?

Học sinh có trách nhiệm gì trong việc xây dựng và bảo vệ hệ thống chính trị?

Trong không gian Oxyz, cho mặt phẳng (P): \(ax + by + cz+9=0\) chứa hai điểm A(3;2;1), B(-3;5;2) và vuông góc với mặt phẳng (Q): \(3x+y+z-5=0\). Tính tổng S = a+b+c.

Phương trình đường tròn có tâm \(I(1;2)\) và đi qua điểm \(A( - 1;3)\) là?

Nước ta rơi vào ách đô hộ của nhà Minh đánh dấu bằng sự kiện nào? 

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

Taking Home the World Cup

Standing just 36 centimeters tall, the FIFA World Cup Trophy symbolizes the pinnacle of football achievement.  Every four years, teams worldwide compete for it, but no one ever takes the trophy home. Made of 18-carat gold, the original trophy remains under FIFA's protection, with winners receiving only a replica. This measure safeguards it from theft, as the trophy has been stolen twice in its history.

The original trophy was made by a French sculptor, Abel LaFleur, and was called the “Jules Rimet Cup,” in honor of the founder of the World Cup tournament. Sometime during the first three World Cup events (1930, 1934, and 1938), the name changed to simply the “World Cup.” Then during World War II, not much was seen or heard of the trophy. It was being kept hidden in a shoe box under the bed of Dr. Ottorino Barassi, the Italian vice-president of FIFA, to prevent it from falling into the hands of the Nazi army. In 1966, the Cup was stolen during a public showing of the trophy prior to the World Cup tournament in England. Luckily, it was found a short time later, none the worse for wear, in a trash container by a little dog named Pickles. Four years later, Brazil earned permanent possession of the original trophy by winning its third World Cup title. Unfortunately, the trophy was stolen a second time in 1983 and was never recovered. The Brazilian Football Association had to have a duplicate trophy made.

(I) After the first trophy became the possession of Brazil’s football association, a new World Cup Trophy for FIFA was designed by an Italian artist, Silvio Gazzaniga, in 1974. (II) This trophy cannot be won outright, but remains in the possession of FIFA, and rest assured they are watching it very closely. Today, World Cup winners are awarded a replica of the trophy that is gold-plated, rather than solid gold like the real one. (III) Gazzaniga’s World Cup trophy weighs almost five kilograms. (IV) Its base contains two layers of a semi-precious stone called malachite, and has room for seventeen small plaques bearing the names of the winning teams---enough space to honor all the World Cup champions up to the year 2038. After that, a new trophy will have to be made.

Which of the following best paraphrases the underlined sentence?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

Who are you?

On 6 June 2011, the media reported the kidnapping of a female Syrian-American blogger called Amina Arraf. Regarded as a daring political rebel, the 35-year-old had gained popularity for her blogs protesting the lack of freedom in Syria. Yet, only two days later, it was discovered that Amina had never existed. She was a fictional character created by Tom MacMaster, a forty-year-old American PhD student at the University of Edinburgh.

MacMaster's invention is an example of sock puppetry: the use of false identities to deceive others. (I). The false identity is known as a sock puppet, and its creator, a puppet master. (II). MacMaster created Amina to express his views on Middle Eastern affairs without offending other Americans. (III). Writing as Amina gave him the authority to say what he wanted. (IV).  

At the turn of the millennium, Debbie Swenson created Kaycee Nicole, a fictional teenage girl suffering from terminal cancer. Her blog, Living Colours, described Kaycee’s struggle, attracting millions of readers. When Kaycee 'died' on 14 May 2001, her fans were devastated. Their distress turned to anger when they discovered that Kaycee was not real. Swenson had developed the character to gain attention and sympathy.

While Amina and Kaycee were used to meet their creators' needs, other identities have been invented for profit. American gun advocate John Lott made up a fake student, Mary Rosh, to defend his writing online and give him positive reviews. Mystery writer RJ Ellory fabricated a team of sock puppets to praise his own books and tear into those of his rivals. British historian Orlando Figes lost credibility when he had to publicly apologise for doing the same.

Yet none of these stories compare to large-scale sock puppetry today. The New York City Police Department has false identities on social media to catch criminals. The US military is believed to use sock puppets to track potential terrorists. It is clear that the internet is a minefield today and we all have to step very carefully in order not to get hurt.

Which of the following best summarizes paragraph 3?

Một đặc điểm KHÔNG phải của mạng LAN là

Cho \(\text{sin}\alpha =\frac{1}{3}\) với \({{90}^{\circ }}<\alpha <{{180}^{\circ }}\).

Find the word which has a different sound in the part underlined

<Điều kiện> trong câu lệnh rẽ nhánh là?

Mark the letter A, B, C, or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17 

a. Sally: Definitely! This score opens so many doors, and I’m aiming for a university in Australia.

b. Janna: That clearly paid off! You must feel so proud. Are you planning to study abroad now?

c. Sally: Hey Janna, guess what? I just got my IELTS results, and I scored an 8.0!

d. Janna: Wow, Sally! That’s amazing! Congratulations! How did you manage to achieve such a high score?

e. Sally: Thanks! I focused a lot on practicing my speaking and writing skills, and I took mock tests regularly.

Đặt một điện tích thử - 2.10^-6 C tại một điểm, nó chịu một lực điện 2.10^-3 N có hướng từ trái sang phải. Cường độ điện trường có độ lớn và hướng là

Điều nào sai khi nói về các đặc điểm của virus?

Khi tìm hiểu về các yếu tố ảnh hưởng đến tốc độ phản ứng, để trả lời cho câu hỏi “Nồng độ chất tham gia ảnh hưởng đến tốc độ phản ứng như thế nào?”, học sinh đã tiến hành thí nghiệm theo các bước:

Bước 1: Chuẩn bị 2 cốc thuỷ tỉnh 250 mL được đánh dấu A và B.

Bước 2: Rót 50 mL dung dịch hydrochloric acid (HCI) 1 M vào cốc A; 50 mL dung dịch HCl 2 M vào cốc B.

Bước 3: Cho 1 gam bột kẽm (Zn) vào mỗi cốc. Quan sát hiện tượng xảy ra ở 2 cốc.

Phát biểu nào sau đây đúng?