户外临时栅栏高度不应低于（）。
A.1m
B.1.2m
C.1.5m
D.1.8m
参考答案：C
—What about going swimming with me?
—Sorry. I have a lot of homework _____. [ ]
A. to do
B. done
C. do
D. to be done
对N个结点的线性表进行查找，用顺序查找的时间复杂性为 (44) 。
A．N*N
B．Nlog2N
C．N
D．log2N
