Một học sinh nhìn qua kính hiển vi vào một hộp nhỏ chứa không khí và khói được chiếu sáng. Phát biểu nào sau đây là đúng?
Một học sinh nhìn qua kính hiển vi vào một hộp nhỏ chứa không khí và khói được chiếu sáng. Phát biểu nào sau đây là đúng?
Một học sinh nhìn qua kính hiển vi vào một hộp nhỏ chứa không khí và khói được chiếu sáng. Phát biểu nào sau đây là đúng?
Trong hộp có các hạt khói.
Trong hộp có các chấm đen.
Các chấm đen chuyển động hỗn loạn.
Các phân tử khói bị các phân tử không khí bắn phá.
Hãy suy nghĩ và trả lời câu hỏi trước khi xem đáp án
Nhìn qua kính hiển vi, ta sẽ quan sát thấy nhóm các phân tử khói (đám khói) bị bắn phá.
Bộ Đề Kiểm Tra Tham Khảo Giữa Học Kì I - Môn Vật lí 12 - Kết Nối Tri Thức được biên soạn và tổng hợp những kiến thức cơ bản đã học nhằm giúp học sinh củng cố kiến thức, đánh giá năng lực, và chuẩn bị tốt hơn cho các kỳ thi quan trọng sắp tới.
Câu hỏi liên quan
Cho hai tập hợp \(A=\left\{ 1;2;3;4 \right\}\) và \(B=\left\{ 1;3;5 \right\}\).
Có bao nhiêu tập hợp \(X\) mà \(X\subset A\) và \(X\subset B\) ?
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 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.
After the earthquake, thousands of people __________ to help clean up the streets.
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.
Choose the best sentence that is written from the words and phrases in each of the following questions.
Longevity / can / impact / by / environmental factors / such / air quality / access / clean water.
Read the following passage and choose the correct answer that best fits each of the following blanks.
Helping the community is a meaningful way to give back and create a positive (21) __________ on the lives of those around us. When we help our community, we do things to help our neighbours and the people who live near us. This could mean picking up trash in the park, (22) __________ food to a local shelter, or planting flowers in a public garden.
Community helpers are like superheroes without capes. They volunteer their time and skills to support others. Even small acts of kindness, like smiling at your neighbours or helping an elderly person (23) __________ groceries, can make a big difference.
When we help our community, we (24) __________ strong relationships with the people around us. We create a place where everyone feels cared (25) __________ and valued. So, whether you're cleaning up a park or simply being kind to your neighbours, you're making your community a better and happier place for everyone.
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.
Read the following passage and choose the correct answer that best fits each of the following blanks.
Helping the community is a meaningful way to give back and create a positive (21) __________ on the lives of those around us. When we help our community, we do things to help our neighbours and the people who live near us. This could mean picking up trash in the park, (22) __________ food to a local shelter, or planting flowers in a public garden.
Community helpers are like superheroes without capes. They volunteer their time and skills to support others. Even small acts of kindness, like smiling at your neighbours or helping an elderly person (23) __________ groceries, can make a big difference.
When we help our community, we (24) __________ strong relationships with the people around us. We create a place where everyone feels cared (25) __________ and valued. So, whether you're cleaning up a park or simply being kind to your neighbours, you're making your community a better and happier place for everyone.
Read the following passage and choose the correct answer that best fits each of the following blanks.
Helping the community is a meaningful way to give back and create a positive (21) __________ on the lives of those around us. When we help our community, we do things to help our neighbours and the people who live near us. This could mean picking up trash in the park, (22) __________ food to a local shelter, or planting flowers in a public garden.
Community helpers are like superheroes without capes. They volunteer their time and skills to support others. Even small acts of kindness, like smiling at your neighbours or helping an elderly person (23) __________ groceries, can make a big difference.
When we help our community, we (24) __________ strong relationships with the people around us. We create a place where everyone feels cared (25) __________ and valued. So, whether you're cleaning up a park or simply being kind to your neighbours, you're making your community a better and happier place for everyone.
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?
Write a complete sentence using the words and phrases given in each of the following questions.
Volunteering activities / help / many teenagers / find / sense / purpose / life.
Choose the answer that indicates the underlined part that needs correction in each of the following questions.
I received an important phone call, yet I stopped driving and pulled over to answer it.
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:
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.
Cặp̣ số nào sau đây là nghiệm của bất phương trình \(2x-y>1\) ?
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.
(30) What does the passage imply about the future of 3D printers?
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.
Chọn mệnh đề đúng trong các mệnh đề sau: