算法的时间复杂度是指( )。

A．执行算法程序所需要的时间

B．算法程序的长度

C．算法执行过程中所需要的基本运算次数

D．算法程序中的指令条数

Which statement about the ARJ-21 Advanced Regional Jet is false().

A. It is the first homegrown Chinese jetliner for the 21st Century.

B. It is of medium range.

C. It should start to roll off the production line later this year.

D. None of the above.