Production efficiency occurs when production ( ). A: is at a point beyond the production possibilities frontie B: is on the production possibilities frontier or inside it C: is at any attainable point D: is on the production possibilities frontie

There is an _______ of possibilities in cancer researches.

Every object around us may be connected, collecting, processing and sharing information. The Internet of Things opens up a new world of 6____________possibilities.

中国大学MOOC: Suppose there are only two people in the world. Each person’s production possibilities frontier also represents his or her consumption possibilities when

On a production possibilities frontier, production is efficient if the production point is

Career planning helps you to () your career possibilities

A rise in the price of imports or a fall in the price of exports will A: improve the terms of trade B: worsen the terms of trade C: Expand the production possibilities curve D: Contract the production possibilities curve

If an economy is represented by a point inside its production possibilities curve:

（ ）tense opens intriguing possibilities about what may happen next.

When Mary talked with Deng Ling about some possibilities, she said__