A.Because the kitchen has a strange smell. B.Because everything looks old and unpleasant. C.Because one cannot find what he or she needs. D.Because all of the above.
【简答题】核电子学的研究内容与普通电子学不同,主要体现在研究的是A. 随机的电流脉冲,持续时间短,纳秒到微秒; B. 周期的电流脉冲,持续时间短,微秒到毫秒; C. 随机的电流脉冲,持续时间短,微秒到毫秒; D. 周期的电流脉冲,持续时间短,纳秒到微秒; E. 电压脉冲幅度小,通常为毫伏量级; F. 电压脉冲幅度小,通常为伏的量级。