耳目的建立和使用必须严格保守秘密，坚持（）。
A、个别吸收
B、单线领导
C、专人联系
D、定期考核
参考答案：A, B, C
选词填空
A. dream B. famous C. twice D. both E. hangs
小题1:On weekends, my sister often__________ out with her friends.
小题2:My grandpa goes fishing ____________ a week.
小题3:To learn English well is my ____________.
小题4:Hangzhou is __________ for the West Lake.
小题5:Mary's parents ___________ hate potato chips.
在长度为n的有序线性表中进行二分查找，最坏情况下需要比较的次数是
A．O(n)
B．O(n2)
C．O(log2n)
D．O(nlog2n)
