参考答案和解析
正确答案:
C
解析:
推理题。文章最后提到“…nanotech has been one of science’s fastest-growing fields in recent years,with potential application in fields as diverse as energy production and toothpaste manufacture.The nanotech market is projected to be worth $1 trillion by2015.”由此可以推断出,纳米科技的发展是很有前途的,即promising,其他选项不合题意。故选D。