问题 单项选择题

将一幅分辨率为640×480,具有224种彩色的图像以我国PAL制的视频标准无闪烁显示动画4s,则该动画全部图像所占用的存储量约为 (13)

A.8.80MB
B.7.37MB
C.87.89MB
D.737.28MB

答案

参考答案:C

解析: 以我国PAL制的视频标准无闪烁显示动画,则需每秒达到25帧以上。设一幅分辨率为640×480,224种彩色的图像所包含的数据量为D1。
D1=640×480×24b=7 372 800b
再假设无闪烁显示动画4s所用的全部图像占用的存储量D2。
D2=25×4×7 372 800b=7372.8×106b=87.89MB

单项选择题
阅读理解

Christmas Eve means a warm get-together with friends, a candlelight dinner, or perhaps a celebration at a pub(酒馆) for students. But, for Cai Yingjie, the night has a different meaning: helping beggars(乞丐) and the homeless(people without homes).

Cai, who is a student in journalism at Tsinghua, could be found at Beijing’s Wudaokou Light Railway Station that special evening. When she saw an old beggar, she took the cold, rough hands of the woman with her warm, clean hands, and gave   the woman some warm bread and helped her put on a pair of new gloves(手套).

The woman was surprised for a few seconds, then burst into tears, saying “for  the first time I feel respected(尊重)”.

Cai said, “A beggar’s life is very hard. That’s why I want to help them.”

Cai was one of 14 Tsinghua students spending Christmas Eve among the poor. They walked in the cold wind along the streets from 4 to 7 pm on Friday, visiting 15 beggars in Beijing’s Haidian District.

They brought bread and gloves with them, and stopped to greet beggars and offer them some of the warm food. Each beggar greeted them with a look of surprise.

“I know the activity can’t help much, but it’s meant to show our respect and   care for beggars and the homeless who have been neglected for so long,” said Sun,  head of the group. “And Christmas is a good time for that.”

小题1:What does Christmas Eve mean to the 14 Tsinghua students?

A.Taking 15 beggars to Tsinghua.

B.Getting together with friends.

C.Showing care to the beggars and the homeless.

D.Selling bread and gloves to the beggars.小题2:What does the beggar mean by saying “for the first time I feel respected”?

A.The beggar has been waiting for Cai for long.

B.The beggar hasn’t been shown care for so long.

C.The beggar has been respecting Cai for a long time.

D.This is the first time the beggar has seen Tsinghua students.小题3:What did each beggar feel when they received greetings?

A.Sad.

B.Amazed.

C.Frightened.

D. Proud.小题4: The word “neglected” in the last passage means _______.

A.protected

B.found

C.taken care of

D.given no enough care