—British English ______ from American English. They use different words and they spell some words .
A:different, differently
B:different, difference
C:differs, differently
设函数 f( x)的定义域为D,D⊆0,4π,它的对应法则为 f:x→sin x,现已知 f( x)的值域为{0,-12,1},则这样的函数共有____ 个.
一个空间几何体的主视图和左视图都是矩形,俯视图是一个圆,尺寸如图,那么这个几何体的外接球的体积为( )
7.2、6.4、5.6、4.8、____、____.