Welcome to United’s friendly skies. These reminders may be helpful on your trip. We welcome your comments on our service. Smoking is prohibited on all flights within the Continental US, flights serving Alaska, Canada, Bermuda, San Juan, and Cancun, Mexico, flights between the US and Hawaii and Australia. On flights where smoking is allowed, smoking is prohibited in the lavatories, aisles and while the no-smoking sign is illuminated. When smoking is permitted, only cigarettes are allowed in the smoking sections. Carry-on baggage must be stowed (安置) under a seat, in an enclosed overhead bin, or in a closet during take-off and landing. Televisions, AM/FM radios, portable cellular telephones, remote-control toys and similar electronic devices must not be used on board because they may interfere with communication and navigation systems. 1. Passengers’ opinions on (46) are welcome. 2. On flights within the Continental US, smoking is (47) . 3. In the smoking sections, only (48) are permitted. 4. (49) must be stowed under a seat, in an enclosed overhead bin or in a closet during take-off and landing. 5. Usage of some electronic devices may cause (50) problems.