Example sentences of "is [not/n't] [vb pp] [prep] a single " in BNC.

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1 Ideally , the product should also run on a range of platforms so that the user is not tied to a single source of hardware .
2 Zimbabwe 's economy is not based on a single commodity like Zambia 's and it did not experience the mass exodus of whites and ‘ scorched earth ’ policies of the Portuguese in Mozambique and Angola .
3 Unlike realism , liberal pluralism is not based on a single set of ideas developed over time , but embraces a variety of approaches .
4 Adulthood is not recognised as a single event evident to everyone .
5 This susceptibility is not caused by a single gene defect but is thought to result from the cumulative interaction of a number of genes .
6 Pluralism holds that , at least in modern Western democracies , power is not monopolized by a single ruling class but is distributed between a plurality of interest groups of different kinds , which are represented in the political arena by a variety of organizations including political parties .
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