0,2,4,3,8,6,( )
A.9
B.12
C.14
D.15
参考答案:B
解析:间隔组合数列。奇数项0、4、8、(12)是公差为4的等差数列;偶数项2,3、6是积数列。
We thought it was he who did it, but it _________ that he wasn’t even there.
A.turned up
B.turned down
C.turned off
D.turned out
曼陀铃,琴体为木质音箱,象半个梨形;琴颈上有品,琴头略向后仰用拨子拨弦。她的弦是怎么分布的?