[简答题]Things aren’t always as they appear, a fact of life confirmed for me firsthand in 1990, just after I received my Ph.D. in physics. I had just started a temporary postdoctoral position at a major laboratory and had the opportunity to talk with scientists whose postdoctoral fellowships were ending. 21) Although my advisers had warned me that finding a permanent position in science would be difficult, what I discovered was shocking — even the best young scientists I knew were having difficulty securing permanent employment. So it was both puzzling and disturbing to see press reports claiming that America didn’t have enough scientists.
These alarming reports were epidemic in 1990. Frequently the news stories had hyperbolic headlines like SHORTAGE OF SCIENTISTS APPROACHES A CRISIS AS MORE STUDENTS DROP OUT OF THE FIELD, and they often quoted National Science Foundation (NSF) officials. 22) For a government obsessed with international competitiveness, stories of a shortage o

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