Tích của giá trị nhỏ nhất và giá trị lớn nhất của hàm số $y = f\left( x \right)=x+\dfrac{4}{x}$ trên đoạn $\left[ 1;3 \right]$ bằng

Vai trò của đất với cây trồng là:

Liên bang Nga là quốc gia đầu tiên đạt được thành tựu nào sau đây?

Tỉ lệ H : O trong phân tử carbohydrate là bao nhiêu?

Hàm số nào dưới đây có đồ thị dạng như đường cong hình bên? 

Đối tượng nghiên cứu của hóa học là

Choose A, B, C or D: The government is aiming______50 % reduction______ unemployment.

Trộn 200mL dung dịch HCl có pH = 2 với 300mL dung dịch NaOH có pH=12. pH của dung dịch thu được sau khi trộn là

Ai là người lãnh đạo phong trào Cần Vương chống Pháp trong giai đoạn từ năm 1885 đến tháng 11-1888?

Read the passage and do the tasks below. Choose the best answers to complete the following sentences.

Most people relate stress to physical symptoms like an upset stomach or headaches. Research has suggested that negative emotions and thoughts may also have close links to our brain. Researchers have started finding out why we tend to remember negative things more strongly and, in more detail, than good ones. “The hrain handles positive and negative information in different parts. Negative emotions involve more thinking, and the information is processed more thoroughly. Thus, we tend to ruminate more about unpleasant events and use stronger words to describe them than happy ones," said Clifford Nass, a professor at Stanford University.

Rick Hanson also shares the idea that our minds naturally focus on the bad and discard the good. He stated, "negative stimuli produce more neural activity than do equally intense positive ones. They are also perceived more easily and quickly." This was obtained from his little experiment in which twenty people were asked to look at pictures showing anger or happiness. The participants could identify angry faces faster than happy ones even if it was so quickly.

In a journal article Baumeister co-authored in 2001, "Bad is Stronger Than Good", he concluded, "bad emotions, bad parents and bad feedback have more impact than good ones." This is "a basic and wide-ranging principle of psychology". Thus, Baumeister and his colleagues noted that bad incidents, such as losing your dreamy job and breaking up with your girlfriend or boyfriend, may have a greater impact than landing a job or receiving a marriage proposal.

People have generally related stress to ____.

Mạch lọc của mạch nguồn một chiều sử dụng:

Mùa hè năm 2023, một công ty thời trang sản xuất ba dáng áo phông mới, mỗi dáng áo đều được sản xuất với các màu: cam, đỏ, trắng, vàng, và xanh và với các cỡ: \(\text{S}\), \(\text{M}\), \(\text{L}\), \(\text{XL}\), \(\text{XXL}\), \(\text{XXXL}\). Có tất cả bao nhiêu loại áo phông khác nhau mà công ty sản xuất cho dịp hè năm 2023?

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 can be inferred from the passage?