直方图均衡化的目的是让原始图像的直方图在整个灰度范围内服从
A. 正态分布
B. 均匀分布
C. 高斯分布
D. 泊松分布
27. Mr Brown wrote the words down on ________.
A. the wall
B. B. the door
C. a piece of paper
D. D. his son's pocket
30. What was burnt? ___________.
A. The piece of paper
B. Mr Smith
C. C. The visitor
D. D. The boy
29. The man was very surprised because _________.
A. he thought the child's father was dead
B. the child didn't ask him to sit down
C. C. the child gave him a cup of tea
D. D. he couldn't find that piece of paper
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