Câu hỏi:

Parabol (P): y = −2x2 – ax + b có điểm M (1; 3) với tung độ lớn nhất. Khi đó giá trị của b là

A. 5

B. 1

Đáp án chính xác

C. -2

D. -3

Trả lời:

Đáp án B

====== TRẮC NGHIỆM TOÁN 10 =====

hoc tap vn

The car ________ three days ago.

ĐỀ THI GK2 TOÁN 11- NGUYÊN HUỆ – 2024 – Sách Toán

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 36 to 42. There has always been a problem with teachers being from a different generation to their pupils, older educators. But the dominance of digital technology has spread that generation gap even wider, as young people become conversant with mobile digital devices, games and social media that didn’t exist when their teachers were growing up. Teachers now face students using devices and online systems that they don’t use themselves, and don’t really understand either. The generation gap is more prevalent than ever, but teachers can bridge that gap if they receive the right guidance with appropriate technology. Some schools and teachers have particular trouble grasping the role of social media and mobile devices in teenage life. They consider Facebook a threat and warn parents against it at parent-teacher evenings, without realizing that preventing teenagers from using social media like this, or messaging apps such as Snapchat and Instagram, is nearly impossible. Online social media and network gaming are now such an integral part of teenage behavior that any attempt to prize the mobile devices out of the hands of young people is likely to widen the generation gap rather than narrow it. The generation gap in education isn’t just between students and teachers – it exists within the staffroom, too. A teaching career can span more than 40 years, and those towards the end of their working life will not have grown up with digital technology, whereas teaching staff in their 20s and 30s could well be “digital natives”. Keeping up with the latest online trend is like a dog chasing its tail; every time you think you’ve caught up, kids move on. However, it’s not beneficial to get fixed on how young people are using social networks that are, in the case of Snapchat, hard for the older generation to understand. The key factor to consider is that today’s school students now take for granted that a lot of their communication with their peers will be online, and mainly using smartphones and other mobile devices. Young people expect their educational experience to be similarly interactive, and partially delivered via these kinds of devices. (Adapted from https://www.alphr.com/) Which of the following could be the best title of the passage?

Bộ 12 đề thi Học kì 2 Toán lớp 3 theo Thông tư 22

Read the following passage and mark the letter A, B, C, D on your answer sheet to indicate the correct answer to each of the questions.Face-to-face conversation is a two-way process. You speak to me, I reply to you and so on. Two-way (23)_______depends on having a coding system that is understood by both sender and (24)_______, and an agreed convention about the beginning and end of the message. In speech, the coding system is the language like English or Spanish; the convention that one person speaks at a time may seem too obvious to mention. In fact, the signals (25)_______ in conversation and meetings are often (26)_______. For example, lowering the pitch of the voice may mean the end of a sentence, a sharp intake of breath may signal the desire to interrupt, catching the chairman’s eye may indicate the desire to speak in a formal setting like a debate, a clenched fist may indicate anger. When (27)_______ visual signals are not possible, more formal signals may be needed.Fill in box 25

Giáo án khoa học 5 bài 49 – 50: Ôn tập: Vật chất và năng lượng mới nhất

Trả lời

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