alternative

Passage 1  The Bush Administration appears determined to continue the war on drugs that has been actively pursued by all U. S. governments since the Nixon Administration.  Defenders of the war on drugs often throw in an economic (1)_____. It has been

Passage 1  The Bush Administration appears determined to continue the war on drugs that has been actively pursued by all U. S. governments since the Nixon Administration.  Defenders of the war on drug

超材料 : 批判与抉择 : critique and alternatives.pdf

本书一方面通过理论方法详细阐述了从双负材料的概念出发将导致负时间这一根本违背物理常识的结论,从而论证了双负材料的不可实现性;另一方面还结合史密斯圆图,具体给出了某些被声称只有用超材料才能解决而实际上并不能实现的很多问题的可实现的解决方案。