一个六边形的内角和是（ ）
A．540°
B．700°
C．720°
D．800°
根据内角和公式可得：（6-2）×180°=720°，
故选：C．
There are more than three________ students in our school. Look, _________ students are having a gathering on the square.
A．thousands of; hundreds of
B．thousand; hundreds of
C．thousand of; hundreds of
D．thousand of; hundred of
座位数大于( )的客车及运送易爆物品的汽车就应装备灭火器，灭火器在车上应安装牢固并便于取用。
A．9
B．7
C．12
D．15
