The assumptions made will affect the type of series(级数) obtained.

A prescription drug is a __________ that is regulated by legislation to require a medical prescription before it can be obtained.​

The marginal product of an input in the production process is the increase in A: total revenue obtained from an additional unit of that input. B: quantity of output obtained from an additional unit of that input. C: profit obtained from an additional unit of that input. D: total revenue obtained from an additional unit of that input.

The Customs will not （） the restricted goods unless an import or export license is obtained. A: clear B: release C: sell D: buy

Using proper verbs in Results subheadings instead of abstract nouns can improve the understanding of the results obtained. A: 正确 B: 错误

The indicated power of an engine can be obtained by taking the （）.

Primary data can be obtained through observation.

48. Access to a hold can be obtained through______.

1. Nowadays, the post remains ...ly obtained or used)

Which of the following can be obtained by means of an indicator card?（）