一般是一年进行一次。但如果是营运客车，5年内每年进行一次，五年以上的每6个月进行一次；如果是小型私家车满6年内每两年检查一次，六年以上的每六个月检查一次，如果满十五年以上每六个月也需检查一次。法律依据：《道路交通安全法实施条例》第十六条 机动车应当从注册登记之日起，按照下列期限进行安全技术检验。
五年的石金钱龟在人工养殖情况下可长4斤左右。
金钱龟是国家二级保护动物。不过现在全国多个地区都有人工养殖。特别南方省份，比如广东、福建、浙江、广西、海南等。据查阅资料悉：人工养殖的金钱龟生长速度比野生的快，商品龟吃的多，长得快，生长期1～4周年，每年增加重量0.6～1.2斤，野生的每年增加重量0.3斤。
下面是一篇适合5年级或6年级学生阅读的英文短文：
Title: My Favorite Sport - Basketball
Basketball is my favorite sport. I love to play it after school with my friends. It's both fun and good exercise.
When I play basketball, I feel free and happy. I can run fast, jump high, and shoot accurately. I also need to use my brain to make quick decisions, such as passing the ball to a teammate or taking a shot.
Besides, basketball is a team sport. It requires cooperation and communication among players. When we work together, we can achieve more than playing alone. We can pass the ball to each other, set up screens, and create open shots.
Although I'm not good enough to be a professional player, I still enjoy playing basketball. It helps me stay healthy and confident. I also learn some valuable skills, such as leadership, sportsmanship, and perseverance.
In conclusion, basketball is more than a game for me. It's a passion and a lifestyle. I hope I can continue playing it for years to come, and maybe even teach