HDMI 2.0 supports 4k resolution at 60Hz, but only at 30Hz. This is because HDMI 2.0 has a limited bandwidth of 18Gbps, which is not sufficient to support 4k resolution at 60Hz. The higher the resolution and refresh rate, the more data needs to be transmitted, and HDMI 2.0 simply does not have the capacity to handle the increased data requirements at 60Hz. As a result, the maximum refresh rate for 4k resolution on HDMI 2.0 is limited to 30Hz. **

For Swing and Lindy Hop, it is recommended to wear shoes that are comfortable, have a smooth sole for easy pivoting and sliding, and provide good support for your feet. Many dancers prefer wearing leather or suede-soled shoes as they allow for better traction and movement on the dance floor. Additionally, shoes with a low heel or flat sole are ideal for these styles of dance to help maintain balance and stability while executing fast-paced movements and spins. Overall, the most important factor is to choose shoes that feel comfortable and allow you to move freely and confidently on the dance floor. **

You can buy cardboard with the dimensions 1m x 1m at various places such as office supply stores, craft stores, packaging supply stores, and online retailers. Look for specialty stores that sell large sheets of cardboard or contact local packaging companies to inquire about purchasing cardboard sheets in the specific size you need. Additionally, you can check with local hardware stores or home improvement centers as they may carry large sheets of cardboard for various purposes. **

Boogie Woogie and Lindy Hop are both styles of swing dance that originated in the United States in the early 20th century. Boogie Woogie is characterized by a more upright posture, a bouncier feel, and a focus on footwork and rhythm. Lindy Hop, on the other hand, is known for its energetic, athletic movements, including spins, flips, and aerials, and often involves more partner connection and improvisation. While both dances share some similarities, such as their roots in African American culture and their connection to swing music, they have distinct styles and techniques that set them apart. **

The answer to whether retail trade or wholesale and foreign trade is better depends on various factors such as the specific business goals, target market, and resources available. Retail trade involves selling products directly to consumers, allowing for higher profit margins but also requiring more marketing and customer service efforts. On the other hand, wholesale and foreign trade involve selling products in bulk to other businesses or overseas markets, offering the potential for larger sales volumes but with lower profit margins. Ultimately, the best choice would depend on the individual business's strengths, market opportunities, and long-term objectives. **

The choice between retail trade and wholesale and foreign trade depends on various factors such as business goals, target market, and resources. Retail trade involves selling products directly to consumers, allowing for higher profit margins but requiring more marketing efforts. On the other hand, wholesale and foreign trade involve selling products in bulk to other businesses or overseas markets, offering lower profit margins but potentially higher sales volume. Ultimately, the better option would depend on the specific needs and objectives of the business. **

Online commerce refers to the buying and selling of goods and services over the internet, while retail commerce refers to the traditional brick-and-mortar stores where customers can physically visit and make purchases. Online commerce offers the convenience of shopping from anywhere at any time, while retail commerce provides the opportunity for customers to see, touch, and try products before making a purchase. Online commerce often involves lower overhead costs and can reach a wider audience, while retail commerce provides a more personalized and immediate shopping experience. **

The picture turns black when switching to 4k60Hz because the display or the source device may not support that specific resolution and refresh rate combination. This can happen if the HDMI cable, the display, or the source device is not capable of handling the higher bandwidth required for 4k resolution at 60Hz. It's important to ensure that all components in the video signal chain, including the source device, cable, and display, are capable of supporting 4k resolution at 60Hz in order to avoid the black screen issue. **