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题目详情:
发布时间:2024-06-02 20:37:16

[单项选择]TE是指()
A. 从第一个RF激发脉冲到下一周期同一RF激发脉冲的时间间隔
B. 从第一个RF激发脉冲到填充到K空间中心的那个回波时间间隔
C. 从第一个RF激发脉冲到产生回波的时间间隔
D. 从第一个RF激发脉冲到90°激励脉冲之间的时间间隔
E. 180°反转脉冲与90°激励脉冲之间的时间间隔

更多"TE是指()"的相关试题:

[单项选择]SE序列中TE是指()
A. 回波时间
B. 重复时间
C. 翻转角
D. 信号激励次数
E. 回波链长度
[单项选择]肝海绵状血管瘤MRI特征所见是T2加权像随TE延长肿瘤信号强度递增,TE值多数为
A. 100ms以上
B. 90ms以上
C. 120ms以上
D. 60ms以上
E. 180ms以上
[单项选择]肝海绵状血管瘤MRI特征所见是T加权像随TE延长肿瘤信号强度递增,TE值多数为()
A. 100ms以上
B. 90ms以上
C. 120ms以上
D. 60ms以上
E. 180ms以上
[单项选择]TE错误的描述是()
A. TE范围为8~3000ms
B. 原则上讲TE无最佳绝对值
C. TE短则T1对比好
D. TE长则T1对比好
E. T2加权的TE值为60~150m
[填空题]
Transacting Business via Electronic Data

The term e-commerce embraces all the ways of transacting business via electronic data. (9) and it is the internet that has put e-commerce near the top of the corporate agenda in the first years of the 21st century.
(10) but it embodies a revolutionary idea: that electronic commerce is qualitatively
different from ordinary time-worn commerce, that ( in the jargon) there is a paradigm shift in the way that business is conducted in the world of e-commerce. Doing business via the internet is not only much quicker and much cheaper than other methods, (11) There is the much-vaunted death of distance: a customer 10,000 miles away becomes as accessible as one around the corner. And e-commerce has created the phenomenon of the long tail.
(12) In its April 1999 report "Making Open Finance Pay", Forrester Research, an American research company, gave examples
[单项选择]
Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consumption of energy, increased demand for raw materials, accelerated flow of materials through the economy and increased quantities of metals and other substances in use per person. The history of industrial development is full of examples.
In 1870, homes and mules were the prime source of power on U.S. farms. One horse or many decades. At that time, had a national commission been asked to forecast the horse and mule population for 1970, its answer probably would have depended on whether its consultants were of an economic mm of mind. Had they been "economists", they would have recognized that the power of steam had already been harnessed to industry and to land and ocean transport. They would have recognized further that would be
A. Older technologies die away.
B. The quality of life is improved.
C. Overall productivity increases.
D. More raw materials become necessary.
[判断题]一个移动台由移动终端(MT)与终端设备(TE0)或终端设备+终端适配器(TE+TA)组成。
A.正确
B.错误
[单项选择]Which of the following statements about cloning technology is true


A. Because of the criticism, it has been stopped
B. Because of the opposition, it will be illegal for five years
C. Although it is criticized, it has made great progress
D. Although it is criticized, it is a perfect technology
[填空题]How did Scott help organizations maximize their technology
A. A.By extending the enterprise
B.By using proprietary technology
C.By improving customer relationships.

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