题目

等边三角形的边长为6cm，则它的外接圆半径是          cm． 答案：        AMERICANA HOTEL CRYSTAL CITY        Convenient location 5 minutes from Washington D.C. and one block to Crystal City METRO(地铁),Crystal City Underground, Alexandria. Free Parking, free Deluxe Continental Breakfast and complimentary（收费的）Hotel Shuttle Service to Ronald Reagan Washington National Airport.        14000 Jefferson Davis Hwy(endurance on S. Eads St.)        Phone (703) 979-3722        DAYS INN ARLINGTON        Days Inn Arlington is located two miles from the Pentagon, Lincoln Memorial. There is a restaurant which serves American style food, plus two meeting rooms and an outdoor pool. Complimentary shuttle service runs to the Rosslyn Metro Station. Complimentary parking is available on the property. An experienced staff welcomes guests. Phone（703）525-0300        THE HIGHLANDER MOTORINN        Comfortable rooms at moderate rates. Convenient location only minutes away from Washington area attraction. Near VA Square METRO Station and Ballston Commons Shopping Mall. Free continental breakfast, free parking.        Phone(703)524-4300        HYATT REGENCY CRYSTAL CITY        Conveniently located next to Washington National Airport and two miles from Washington D.C. Complimentary Shuttle to and from National Airport, metro, local restaurants and shopping. Experience a view to remember at out rooftop restaurants “Chesapeake Grill.” Call for Reservations. Phone(073)418-12341(800)233-1234 64. Which hotel does not provide service to drive its guests to the airport or metro stations?        A．Americana Hotel Crystal City B．Days Inn Arlington        C．The Highlander Motor Inn      D．Hyatt Regency Crystal City 65. If you want to stay in a hotel which provides free parking and free breakfast, which Telephone numbers will you ring to ask for further information? A.(703)979-3722 or (703)524-4300            B.(703)524-4300 or (073) 418-12341 C.(073)418-12341 or (703) 525-0300          D.(703)525-0300 or (703)979-3722 66. Which hotel is close to airports?        A．Americana Hotel Crystal City B．Days Inn Arlington        C．Hyatt Regency Crystal City     D．The Highlander Motor Inn 67. Steven loves the idea of having delicious meal while enjoying the night view of Washington D. C. He will probably reserve a room by calling         .        A.(703)524-4300          B.(073)418-12341         C.(703)525-0300           D.(703)979-3722