问题 单项选择题

使用300DPI的扫描分辨率扫描一幅3×4英寸的彩色图像,使用24位真彩色格式,未压缩图像的数据量约()。

A.1055K

B.3164K

C.8438K

D.25313K

答案

参考答案:B

解析:

本题考查图像数字化的基本运算。

按照试题5的分析,DPI表示单位“像素/英寸”,即指在每英寸长度内所含有的像素是多少。24位真彩色图像每个像素点使用三个字节表示的RGB的分量值。

一幅不经压缩的图像数据量计算公式为:字节数=图像水平分辨率×图像垂直分辨率×颜色深度(位数)/8根据题意,900×1200×24/8=3240000B=3164KB。

单项选择题

Research on animal intelligence always makes me wonder just how smart humans are. (91) the fruitfly experiments described in Carl Zimmer’s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly (92) to live shorter lives. This suggests that (93) bulbs burn longer, that there is an (94) in not being too terrifically bright.
Intelligence, it (95) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (96) the starting line because it depends on learning—a gradual (97) —instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (98) .
Is there an adaptive value to (99) intelligence That’s the question behind this new research. I like it. Instead of casting a wistful glance (100) at all the species we’ve left in the dust I.Q. wise, it implicitly asks what the real (101) of our own intelligence might be. This is (102) the mind of every animal I’ve ever met.
Research on animal intelligence also makes me wonder what experiments animals would (103) on humans if they had the chance. Every cat with an owner, (104) , is running a small-scale study in operant conditioning, we believe that (105) animals ran the labs, they would test us to (106) the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really (107) , not merely how much of it there is. (108) , they would hope to study a (109) question. Are humans actually aware of the world they live in (110) the results are inconclusive.

A.if

B.unless

C.as

D.lest

单项选择题