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单项选择题

下列属于信息安全与对抗的系统层次方法的是：

A、针对复合式攻击的各个击破对抗方法
B、共其道而行之相成相反方法
C、重视对抗复合式攻击方法
D、信息系统特殊性保持利用与攻击对抗原理

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单项选择题

由固体自由电子理论可知，T=0K时，固体中自由电子的平均能量为？（假设费米能大约3eV）

单项选择题

租船运输下，承租人支付给出租人的费用称为运费的方式有：

A、包运租船
B、定期租船
C、光船租船
D、航次租船

单项选择题

Study the suffix related to art below and choose appropriate words from the italicized ones to complete the following sentences. The suffix -graphy means "the making of a copy, picture, or record of something". There are many words with this suffix, such as autobiography(自传), calligraphy(书法；笔迹), cartography(地图绘制), cinematography(电影摄影术), iconography(图像；图示法；象征手法), pictography/图画记截法), pyrography(烙花术)，typography(印刷版面式样), xerography(静电复印术). 1. ________ is the art and technique of arranging type to make written language legible, readable, and appealing when displayed. 2 Mona Lisa, as a painting with complex ___________, was painted by the Italian Renaissance artist Leonardo da Vinci. It has been described as "the best known, the most visited, the most written about, the most sung about, the most parodied work of art in the world". 3.Nowadays few people can practice ____________ patiently and they usually communicate by typing, so their signatures are not so decent. 4. After going through ups and downs, you can write a(n) ________________ to look back on the past and truthfully record your life when you are old. 5. ____________ is the study and practice of how to go about making maps. It uses aesthetics, various techniques, and science to communicate spatial information in a cohesive and effective manner. 6. The movie Inception won four Academy Awards for Best__________, Best Sound Editing, Best Sound Mixing, and Best Visual Effects. 7. "Fire Needle Embroidery", also called __________, is a unique traditional form of Chinese arts, gorgeous and eye-catching, giving people simple and natural art enjoyment. 8. Chester Carlson invents"electron photography", which later comes to be known as _____, or simply photocopying

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