题目

Safety and Security Procedures Your safety and the security of your personal property are of the primary concern to those of us who welcome you as our guest. We urge you to take advantage of the following suggestions. YOUR VEHICLE Lock your vehicle and do not leave money or valuable items inside. We are not responsible for their loss. TRAVELING Be observant (机警) when sightseeing or traveling. Stay in well-lit and heavily traveled areas. Don’t display large amounts of cash. GUEST ROOM SECURITY For additional security use the deadbolt (插锁) provided on your door and make sure the windo已知无穷等比数列{an} 中，a1=1，公比q≠-1，且a2+a3=9（a4+a5），那么这个等比数列的所有项的和为________．