冒泡排序在最坏情况下的比较次数是
A.n(n+1)/2
B.nlog2n
C.n(n一1)/2
D.n/2
参考答案:C
Helen devoted herself ________to her research and became a top scientist in the field of applied physics.[ ]
A. seriously
B. extremely
C. entirely
D. strictly
马克思为第一国际起草的文件有( )。 ①《 * * 党宣言》 ②《临时章程》 ③《成立宣言》 ④《资本论》
A.①②③ B.②③④ C.②③ D.①④