关于商朝的叙述,正确的是
①是我国第二个王朝
②人们也称其为殷朝
③是当时世界上的大国
④实行世袭制
⑤最后一个国王是汤[ ]
A.①②③④
B.②③⑤
C.①③④⑤
D.②③④⑤
A
More than _______ of the classmates in my class ____ fond of pop music.
A.two-third, is
B.two-thirds, is
C.second-third, are
D.two-thirds, are
堆排序是一种基于 (1) 的排序方法, (2) 不是堆。
2()
A.15,28,25,56,68,63,30
B.15,28,25,30,68,63,56
C.68,28,63,25,15,56,30
D.68,56,39,63,28,25,15