mooc答案类别订阅

第1周单元测验

1、单选题：
‏脉冲信号是（    ）信号。‏
选项：
A: 正弦波
B: 非正弦波
C: 持续时间极短的
D: 随时间连续变化的
答案: 【 持续时间极短的】点我阅读全文

第1讲之模拟练习题

1、单选题：
​计算之树中，通用计算环境的演化思维是怎样概括的？________。‏
选项：
A: 程序执行环境—由CPU-内存环境，到CPU-存储体系环境，到多CPU-多存储器环境，再到云计算虚拟计算环境
B: 网络运行环境---由个人计算机、到局域网广域网、再到Internet
C: 元器件---由电子管、晶体管、到集成电路、大规模集成电路和超大规模集成电路
D: 上述全不对
答案: 【 程序执行环境—由CPU-内存环境，到CPU-存储体系环境，到多CPU-多存储器环境，再到云计算虚拟计算环境】点我阅读全文

10-1-1微分方程的概念随堂测试

1、单选题：

​

‎选项：
A:
B:
C:
D:
答案: 【 】点我阅读全文

Mini-genresofnarrative

1、单选题：
‏Meantime the Rat, warm and comfortable, dozed by his fireside. His paper of half-finished verses slipped from his knee, his head fell back, his mouth opened, and he wandered by the verdant banks of dream-rivers. Then a coal slipped, the fire crackled and sent up a spurt of flame, and he woke with a start. Remembering what he had been engaged upon, he reached down to the floor for his verses, pored over them for a minute, and then looked round for the Mole to ask him if he knew a good rhyme for something or other.‎‏But the Mole was not there.‎‏He listened for a time. The house seemed very quiet.‎‏Then he called 'Moly!' several times, and, receiving no answer, got up and went out into the hall.‎‏The Mole's cap was missing from its accustomed peg. His goloshes, which always lay by the umbrella-stand, were also gone.‎‏The Rat left the house, and carefully examined the muddy surface of the ground outside, hoping to find the Mole's tracks. There they were, sure enough. The goloshes were new, just bought for the winter, and the pimples on their soles were fresh and sharp. He could see the imprints of them in the mud, running along straight and purposeful, leading direct to the Wild Wood.‎‏The Rat looked very grave, and stood in deep thought for a minute or two. Then he re-entered the house, strapped a belt round his waist, shoved a brace of pistols into it, took up a stout cudgel that stood in a corner of the hall, and set off for the Wild Wood at a smart pace.‎
选项：
A: animal story
B: adventure
C: biography
D: romance
答案: 【 animal story】点我阅读全文

二元函数的几何表示

1、单选题：
二元函数的等值线是
(     ).选项：
A: 同心圆族
B: 同心椭圆族
C: 抛物线族
D: 双曲线族
答案: 【 同心椭圆族】点我阅读全文

第1章 大数据概述 单元测验

1、单选题：
‍第三次信息化浪潮的标志是：‍
选项：
A: 个人电脑的普及
B: 互联网的普及
C: 云计算、大数据、物联网技术的普及
D: 虚拟现实技术的普及
答案: 【 云计算、大数据、物联网技术的普及】点我阅读全文

函数极限测验单元测验

1、多选题：

‍

‌选项：
A:
B:
C:
D:
答案: 【 ;
】点我阅读全文

单元测验

1、单选题：
​如果墨西哥比索相对于人民币贬值，那么(   )。‍
选项：
A: 购买比索需要更多的人民币
B: 购买人民币需要的比索数目减少
C: 人民币相对于比索升值
D: 墨西哥市场上的中国商品价格会下跌
答案: 【 人民币相对于比索升值】点我阅读全文

第十单元测试

1、单选题：
‏考虑了能带论的近自由电子近似以后，以下说法错误的是？‎
选项：
A: 三维的正二价金属恰好能把价带以下的能带（包括价带）全部填满
B: 金属Na的费米面完全分布在第一布里渊区内，没有与布里渊区边界面相交
C: 等能面在布里渊区边界上与界面垂直相交
D: 金属Cu的费米面完全分布在第一布里渊区内，但是与布里渊区边界面相交
答案: 【 三维的正二价金属恰好能把价带以下的能带（包括价带）全部填满】点我阅读全文

第一章单元测试

1、单选题：
‍（      ）在《风险、不确定性和利润》一书中提出信息可以作为商品。‍
选项：
A: 凡勃伦
B: 奈特
C: 米塞斯
D: 哈耶克
答案: 【 奈特】点我阅读全文