Một nhà máy thép mỗi lần luyện được 12 tấn thép. Biết nhiệt nóng chảy riêng của thép là 2,77.10⁵ J/kg. Nhiệt lượng cần cung cấp để làm nóng chảy thép trong mỗi lần luyện của nhà máy ở nhiệt độ nóng chảy là

Choose the answer to fill in the blank in each of the following questions. 

This map is __________ for tourists because it's too old and doesn't show the new roads.

Choose the answer to fill in the blank in each of the following questions. 

After the earthquake, thousands of people __________ to help clean up the streets.

Choose the word whose stress pattern is different from the other three in each of the following questions. 

Choose the answer to fill in the blank in each of the following questions.

It's convenient __________ a GPS navigation system in your car.

Choose the answer to fill in the blank in each of the following questions. 

I'll be disappointed if my favourite contestant is __________ in the first round.

Write the second sentence so that it has the same meaning as the given one in each of the following questions. Use the word in brackets.

 “You should spend more time in nature,” the doctor told me. (advised)

____________________________________________________

Choose the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Provide the correct form of the verb in each of the following sentences.

We saw a rare bird while we __________________ (hike) in the forest.

Write a complete sentence using the words and phrases given in each of the following questions. 

The internet / enable / people / connect / globally / since / its invention.

Choose the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Choose the answer that indicates the underlined part that needs correction in each of the following questions.

Have you call your parents and told them about the party yet?

Miền nghiệm của hệ bất phương trình: \(\left\{ \begin{array}{*{35}{l}}  3x+y\ge 9  \\  x+2y\ge 8  \\  y\le 6  \\ \end{array} \right.\) là phần mặt phẳng chứa điểm có tọa độ:

Choose the answer that is CLOSEST in meaning to the underlined word/phrase in each of the following questions.

Donations of food and clothing can make a difference in the lives of impoverished individuals.

Chọn mệnh đề đúng trong các mệnh đề sau:

Provide the correct form of the verb in each of the following sentences.

The new policy allowed employees __________________ (work) from home twice a week.

Choose the answer to fill in the blank in each of the following questions. 

I __________ the same backpack since I started high school.

Read the passage and choose the correct answer to each of the following questions.

1. Imagine this: Your little brother's favourite toy car has a broken wheel, and he's about to cry. You're not worried, though. You take some pictures of the broken part and use your 3D printer to make a new one.

2. 3D printers are amazing machines that can create objects from digital designs. Surprisingly, people first thought of this idea way back in 1984, and by 1993, they started a company to make it happen! Since 2004, 3D printers have become small and affordable, so almost anyone can have one at home. In 2018, they sold more than half a million of them around the world.

3. How do they work? Well, instead of using ink like regular printers, 3D printers use materials like plastic or metal. They put these materials layer by layer to build a 3D shape.

4. People are using 3D printers to make all sorts of things, like jewelry and decorations. Even sports companies are using them to make shoes that fit perfectly. And doctors use 3D printers to make things like replacement bones. It makes surgeries easier and helps people get better faster.

5. 3D printers are developing all the time, and are becoming the piece of technology every home should have. And you might be able to print one soon, who knows yourself.

(29) Which of the following is NOT mentioned as a use of 3D printers?

Choose the answer to fill in the blank in each of the following questions. 

The machine was tested to ensure it was __________ for different weather conditions.

Choose the answer that indicates the underlined part that needs correction in each of the following questions.

The development of social media has complete changed how we connect with friends and family.

Choose the answer that is CLOSEST in meaning to the underlined word/phrase in each of the following questions.

He learned how to mend a flat bicycle tire by watching a tutorial online.