下列情形中，与近视眼矫正相符的是[ ]
A.
B.
C.
D.
答案：B
The headmaster suggested that a good preparation ________ ahead of time.
A．must be made
B．should be made
C．will be made
D．can be made
对长度为n的线性表进行顺序查找，在最坏情况下所需要的比较次数为
A．log2n
B．n/2
C．n
D．n+1
