对于长度为n的线性表，在最坏情况下，下列各排序法所对应的比较次数中正确的是_____

发布时间：2017-05-23 22:33 │ 来源：www.tikuol.com

题型：单项选择题

问题：

对于长度为n的线性表，在最坏情况下，下列各排序法所对应的比较次数中正确的是______。

A．冒泡排序为n/2

B．冒泡排序为n

C．快速排序为n

D．快速排序为n(n-1)/2

考点：计算机等级考试 VISUAL FOXPRO 二级VISUAL FOXPRO笔试

题型：单项选择题

读太阳光照和地球上的温度带示意图，完成以下小题。

小题1:下列说法，正确的是

A．①地位于北温带

B．①②两地终年寒冷

C．③地有太阳直射现象

D．冬至日，⑤地漫漫长夜，终日不见太阳小题2:如图示时刻

A．全球各地昼夜等长

B．②地获得太阳光热较③地多

C．北京正处于夏季

D．正是我国科学考察队去南极科学考察的最佳时期

查看答案

题型：单项选择题

一平抛物体抛出后第 t秒末的速度与水平方向成θ角，该地的重力加速度为g，则平抛物体的初速度大小为（）

A．

B．

C．

D．

查看答案

题型：单项选择题

下列选项中那个不是电力机车再生制动回收利用技术（）。

A、耗能型

B、馈能型

C、储能型

D、风能型

查看答案

题型：单项选择题

The safety of ships at sea does not depend only on the arrangements made in the ships themselves. Dangerous coasts and rocks may be seen in the daytime, (51) they are a threat to safe navigation at night. Lighthouses are therefore erected at such places to (52) sailors of the danger. Modern lighthouses are put up at all dangerous places near the courses (53) by ships. On some rocky coasts several lighthouses may be built not far from each other, and (54) the sailors on a ship may know which is which, they have (55) arrangements of lights. One lighthouse will give a single flash at regular (56) , another may give two flashes; a third may give two followed by one; and so on. (57) watching the lights the navigator is able to decide exactly where he is, and he can set his (58) with confidence. In the approaches to some ports two continuous lights are set up, one above (59) but some distance behind; when they appear from the sea one above the other, the ship is on the right course; but if they do not, the captain knows that he is (60) his course and likely to strike a rock or the bottom of the sea.

A．another

B．other

C．the other

D．one

查看答案

题型：单项选择题

矿石有益组分是指可以回收利用或能改善产品性能的组分。（

查看答案

更多题库