When the price of a commodity drops, consumers’ expenditure on it decreases as well. It shows that this commodity is （ ）. A: elastic B: unitary elastic C: inelastic D: all of the above are possible

A few sellers may behave as if they operate in a perfectly competitive market if the market demand is: A: highly inelastic. B: very elastic. C: unitary elastic. D: composed of many small buyers.

Before 1984, the organizational system of the People's Bank of China was (). A: composite central banking system B: quasi-central banking system C: unitary central banking system D: dual central banking system

As a result of running high temperature this summer in the south of China, the corn crop declined sharply. If corn growers experienced an increase in sales revenue, the demand for corn must be ( ) A: price elastic. B: price inelastic. C: unitary elastic. D: perfectly inelastic.

直线职能制源于泰勒的职能工长制，直线职能型组织结构被称为“U-型组织”或“简单结构”或“单一职能型结构”“单元结构”（U-form Organization, Unitary Structure）。? 正确|错误

arXiv是一个预印本系统，在arXiv中检索“A graphical calculus for integration over random diagonal unitary matrices ”，可看到这篇文章的标识码为？ A: arXiv:2007.11745 B: arXiv:2007.11219 C: arXiv:2007.10328 D: arXiv:2007.10244