Trong chiến dịch Điện Biên Phủ, Đại tướng Võ Nguyên Giáp đã có một quyết định được đánh giá là sáng suốt, kịp thời và mang đến thắng lợi cho quân ta. Quyết định đó là

A. chuyển từ "đánh lâu dài" sang "đánh nhanh, thắng nhanh"

B. chuyển từ "đánh nhanh, thắng nhanh" sang "đánh lâu dài"

C. chuyển từ "đánh nhanh, thắng nhanh" sang "đánh chắc, tiến chắc"

D. chuyển từ "đánh chắc, tiến chắc" sang "đánh lâu dài"

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.

Productivity Hacks for Great Success

          No matter who we are or where we are from, we only have 24 hours each day to get things done. Some people seem to make the most of their time, using it to achieve their goals and dreams. Others feel that life is passing them by and they aren’t accomplishing anything. If you are in the latter group, it is not too late to turn things around. By implementing a few simple hacks, you can start getting better results very quickly. 

          If you want to become more productive, it pays to learn about the Pareto principle (which is also known as the 80-20 rule). It states that for most tasks, 80 percent of the results we get come from 20 percent of the work we do. For example. 80 percent of the company sales usually come from 20 percent of customers. Therefore, the trick is to focus your efforts on the key 20 percent of actions that truly matter to greatly improve your results. 

          In some cases, people may be busy from morning to night but still seem to get nothing done. In this situation, the problem might be that clear goals haven’t been set. To fix this, set some time aside to list the things you want to achieve in life. Then, select the top three or four that you want to focus on for the next year. Look at your goals every night before bedtime and ask yourself what are the next actions to accomplish each day. Then, promise yourself that you will finish these tasks no matter how busy you get. If possible try completing the tasks first thing in the morning so you are assured of success. 

          Another common mistake regarding productivity is not considering our energy levels. If we try to work around the clock, we will eventually get tired and quit. Everyone needs time to sleep, eat, socialize with friends, and unwind from the stress of the day. To make sure you don’t burn out, be sure to schedule some time for breaks and fun activities into your schedule every day. Finally, no matter how difficult your goals may seem, remember the old saying that “a journey of a thousand miles begins with a single step”.

he phrase “hacks for” in the title is closest in meaning to______.

A. leads to

B. cut off

C. secretly achieve

D. kicks without control

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 45 to 54.

When most people hear the term “National Park”, they automatically think of names
such as “Yellowstone”, or “Yosemite”, or “Grand Canyon”. The big parks’ names bring to mind vast stretches of undisturbed wilderness perfect for hiking, camping, and naturewatching. But while this vision of America’s National Parks is wholly accurate and sufficiently
breathtaking, there’s more.

America’s National Park system has an incredible 388 places to visit. This number includes not only the big parks, but also monuments, historical sites, recreation areas, battlefields, as well as scenic lakeshores, seashores, and rivers. And the Parks themselves don’t just stop at geyser-fields and mule-excursions. In America’s National Parks, you can climb an active volcano in Hawaii, “spelunk” the vast underground world of Mammoth Cave in Kentucky, dive the exotic coral reef of Biscayne Bay in Florida, or cast your fishing nets in the far reaches of the Pacific with the locals of American Samoa. Each of these 388 places has a unique appeal- from the natural to the manmade, from the ethereal to the factual, from the subtle to the overwhelming – with the whole collection offering vacationers a nearly endless range of interests and activities in which to explore and indulge.

SeeAmerica.org is a great place to begin planning your trip to one of, or several of, America’s National Parks. From the homepage, you can search all of the parks by name, region, activity, or even zip code. The site also serves as a portal to other important sites, like the National Park Service’s official website, www.nps.gov, and the National Park Foundation’s, www.nationalparks.org. From SeeAmerica.org, you can get to all the
information you’ll need to plan your trip from start to finish – from directions to the park, to park fees, to typical weather conditions.

What is the most popular national parks in the USA?

A. Yellowstone

B. Yosemite

C. Grand Canyon

D. All are correct

Trộn 10,17 gam hỗn hợp X gồm Fe(NO₃)₂ và Al với 4,64 gam FeCO₃ thu được hỗn hợp Y. Cho Y vào một lượng vừa đủ dung dịch chứa 0,56 mol KHSO₄ được dung dịch Z chứa 83,41 gam muối sunfat trung hòa và m gam hỗn hợp khí T trong đó có 0,01 mol H₂. Thêm NaOH  vào  dung  dịch Z đến khi toàn bộ muối sắt chuyển hết thành hiđroxit và ngừng khí thoát ra thì cần 0,57 mol NaOH, lọc bỏ kết tủa nung trong không khí đến khối lượng không đổi thu được 11,5 gam chất rắn. Biết các phản ứng xảy ra hoàn toàn. Giá trị của m l

A. 3,22

B. 3,42

C. 2,7

D. 2,52