2025 대학수학능력시험 9월 모의평가 듣기 16-17

Good morning, students. Today, we’re going to learn about the key characteristics that enable some animals to reach high speeds. First, there’s no animal faster on land than the cheetah. Its flexible backbone and joints allow for extreme extension, enabling it to stretch its legs very far and push off its back legs with great force like a spring. Second, the falcon is one of the fastest birds. Its large breastbone allows more muscle to be attached to it, so it can beat its wings with greater power. Third, the swordfish is among the fastest fish in the sea. It releases a special, slippery oil from its head that coats the front of its body, enabling it to swim with less resistance. Lastly, the dragonfly is considered the world’s fastest flying insect. It has the unique ability to slightly twist its wings as they swing down, causing a small tornado-like wind that gives it a boost of speed. Now, let’s watch a video of nature’s speedsters.
*breastbone: 흉골, 가슴뼈 
*coat: ~에 칠하다, 웃옷을 입히다

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Using the MinIO API via curl

Using the MinIO API via curl is straightforward, as MinIO is compatible with Amazon S3 API, so most commands follow a similar syntax. Here’s a guide on how to use curl with the MinIO API for some common operations like uploading, downloading, and managing objects. Prerequisites Access Key and Secret Key : Obtain your MinIO Access Key and Secret Key. MinIO Endpoint : Know your MinIO server endpoint, e.g., http://localhost:9000 . Bucket : You may need an existing bucket name, or create a new one using the commands below. Authentication Header For requests to work with MinIO, you need to include authentication in the headers. MinIO uses AWS Signature Version 4 for signing requests. Common Examples 1. List Buckets To list all buckets in your MinIO account, use: curl -X GET \ - -url "http://localhost:9000/" \ - H "Authorization: AWS <AccessKey>:<Signature>" 2. Create a Bucket To create a new bucket, use: curl -X PUT \ - -url "htt...
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The logs of the kubelet service

The logs of the kubelet service can be found depending on how the system is set up. Here are the most common locations: 1. Systemd Logs If your system uses systemd to manage services (most modern Linux distributions do), you can view the kubelet logs using journalctl : View Real-time Logs: sudo journalctl -u kubelet -f View Historical Logs: sudo journalctl -u kubelet 2. Log File on Disk On some systems, kubelet writes its logs to a file in /var/log . The exact location depends on the configuration: Common Locations : /var/log/kubelet.log /var/lib/kubelet/logs If the log file is not there, check the kubelet service configuration for custom log paths. 3. Kubernetes Configuration Flags The kubelet log location can be customized using the --log-dir or --log-file flags in the kubelet service configuration. To verify: Check the kubelet service file: cat /etc/systemd/system/kubelet .service .d / 10 -kubeadm.conf Look for logging-related flags, such as: Exec...
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Develop a Kafka producer to send messages to a Kafka topic

Here’s a guide and code examples to develop a Kafka producer to send messages to a Kafka topic. The examples cover both plain Kafka Producer API and Spring Kafka Producer for convenience. 1. Plain Kafka Producer API Maven Dependencies Add the Kafka client dependency in your pom.xml : < dependency > < groupId > org.apache.kafka </ groupId > < artifactId > kafka-clients </ artifactId > < version > 3.6.0 </ version > <!-- Replace with your Kafka version --> </ dependency > Java Code Example This example demonstrates producing messages to a Kafka topic using the plain Kafka Producer API. import org.apache.kafka.clients.producer.KafkaProducer; import org.apache.kafka.clients.producer.ProducerRecord; import org.apache.kafka.clients.producer.RecordMetadata; import java.util.Properties; public class KafkaMessageProducer { public static void main( String [] args) { // Configure Kafka produce...
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Parasite of korean movie

"Parasite" directed by Bong Joon-ho. It won four Academy Awards, including Best Picture, Best Director, Best Original Screenplay, and Best International Feature Film. "Parasite" is a dark comedy-thriller that explores the theme of class conflict in modern-day South Korea. The film follows the impoverished Kim family as they infiltrate the wealthy Park family's home and try to improve their own lives by exploiting the situation. But as their plan unfolds, things start to spiral out of control, leading to unexpected and shocking consequences. It's a brilliantly crafted film with outstanding performances, a captivating storyline, and thought-provoking themes. It's definitely worth watching!
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리눅스의 부팅과정 (프로세스, 서비스 관리)

보통 사용되지 않는 서비스나 사용 빈도가 적은 프로세스의 경우 stop 시켜두는 것이 시스템 사용 상의 이점이 있다. 자신에게 필요 없는 프로세스를 정지 한다거나 nice 값을 조정하여 실행 시에 프로세스의 우선순위를 변화시킬 수 있다. 이렇게 시스템 상황에 따라 적절히 서비스들을 관리하려면 현재 자신의 시스템의 여러가지 상황을 알아야 하는데, 이런 경우 프로세스 및 실시간 시스템 상황을 보는 명령어인 top 을 사용할 수 있다.  top [-][d delay][q][c][S][s][i][n][b] -d delay : delay 의 시간이 경과하면 현재 스크린을 갱신한다. -q : 이 옵션을 사용하면 스크린을 계속 갱신한다. -c : command list 전체를 보여준다. 즉 욥선을 사용한 것까지 모두 보여준다. -i : idle 상태와 zombie 프로세스는 무시한다.   * 이 외의 옵션은 man 파일을 참고 top 실행 화면 1. First Line :  2:59am up 6days, 10:36,  4 users,  load average    : 현재 시간 2:59 am , 부팅된지 6days and 10시간 36분, 접속해 있는 사용자수, 평균부하 2. Second Line : 61 processes: 56 sleeping, 3 running, 1 xombie, 1 stopped 3. Third Line : CPU states: 36.4% user, 63.5% system, 0.0% nice, 0.0% idle     유저모드에서의 CPU 시간이 36.4%     시스템모드(프로세스를 위해서 커널이 사용한 CPU의 시간)에서의 CPU시간이 63.5%     0.0% nice는 nice로 nice value를 음수로 주어 우선순위를 높이는 경우에 해당하는 모드     0.0% idle(...
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difference between truncate and truncate_preserve in hbase

In HBase, both truncate and truncate_preserve commands are used to delete all the data in a table, but they behave differently in terms of how they handle the table’s schema and regions. 1. truncate Purpose : Deletes all data and regions in a table and then recreates it with the same schema. What It Does : When you run truncate , it: Disables the table. Deletes all data and metadata (including region splits) in the table. Drops all regions and recreates the table as a single region with the original schema. Re-enables the table. Effect on Regions : After truncate , all region splits are lost, so the table will start with only one region. This is useful for development or quick data purging but is inefficient for large tables that rely on pre-split regions for load balancing. Command Syntax : truncate 'table_name' 2. truncate_preserve Purpose : Deletes all data in a table but preserves the table’s regions and schema. What It Does : When you use truncate_...
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What are 5 creative things I could do with my kids' art, 아이와 함께하는 창의적 놀이

Absolutely, preserving your kids' art while also finding creative ways to utilize and display it can be a wonderful solution. Here are five creative ideas to consider: Art Gallery Wall: Designate a section of a wall in your home as an art gallery. Frame selected pieces of your kids' art and arrange them in an organized or eclectic manner. You can change the display periodically to showcase different artworks, creating a rotating gallery. Customized Photo Books: Compile your children's art into a digital photo book or album. Many online services allow you to create customized photo books. Arrange the artwork, add captions, and create a keepsake that you can flip through whenever you want to reminisce. Transform into Functional Items: Turn your kids' artwork into functional items such as placemats, coasters, tote bags, or even custom-made wrapping paper. There are companies that can print your children's art onto these items, making them practical and sentime...
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To create a drawer in the footer using Tailwind CSS

To create a drawer in the footer using Tailwind CSS , you can make a sliding drawer that appears from the bottom of the screen when a button is clicked. Here's how you can create a footer drawer that slides up: HTML & Tailwind CSS Example for Footer Drawer <!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < title > Footer Drawer with Tailwind CSS </ title > < script src = "https://cdn.jsdelivr.net/npm/alpinejs@3.0.6/dist/cdn.min.js" defer > </ script > < link href = "https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel = "stylesheet" > </ head > < body class = "bg-gray-100" > <!-- Main Content --> < div class = "p-4" > < h1 class = "te...
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To switch to a specific tag in a Git repository

To switch to a specific tag in a Git repository, you can use the git checkout or git switch command. Here's how you can do it: 1. List Available Tags First, you may want to see a list of all available tags in the repository: git tag 2. Checkout a Specific Tag Once you know the tag you want to switch to, you can use either git checkout or git switch (if you're using a newer version of Git, which recommends git switch for checking out branches). Using git checkout : git checkout <tag- name > Using git switch (recommended for newer versions of Git): git switch -- detach <tag- name > The --detach flag is necessary because tags are not branches; they are just pointers to specific commits. Using --detach makes your HEAD point to the tag without modifying any branch. 3. Verify the Checkout After switching to the tag, verify that you're on the correct commit: git status This will show the tag you're currently on (you'll see somethi...
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Kafka consumer in a Spring Boot application using a scheduled task

Here’s how to develop a Kafka consumer in a Spring Boot application using a scheduled task for consuming messages. This approach uses @Scheduled to poll Kafka messages at fixed intervals. Step 1: Add Maven Dependencies Add the required dependencies for Spring Kafka and Scheduling in your pom.xml : < dependency > < groupId > org.springframework.kafka </ groupId > < artifactId > spring-kafka </ artifactId > </ dependency > < dependency > < groupId > org.springframework.boot </ groupId > < artifactId > spring-boot-starter </ artifactId > </ dependency > Step 2: Configure Kafka Consumer in application.yml spring: kafka: bootstrap-servers: localhost: 9092 consumer: group-id: schedule-consumer-group key-deserializer: org .apache .kafka .common .serialization .StringDeserializer value-deserializer: org .apache .kafka .common .serialization .StringDeserialize...
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