6. Columbus Day became a U.S. holiday in 1971. It is generally observed by banks, state government offices, the Postal Service and federal agencies. The bond markets are closed for the holiday, but many businesses and stock exchanges remain open.
西西软件园 Participants in the study were between the ages of 18 and 44 and were asked to run twice – with and without shoes. After completing their quick runs, researchers found that the heart rate and overall run speed of each participant had no effect on memory, but the presence of shoes or bare feet did. The researchers have hypothesized that the need to engage the mind while running barefoot to avoid pebbles or other impediments could have a positive impact on a person's ability to remember things. If you're an adventurous person, you might try taking a barefoot jog around the block before your next test or before you need to remember something important.