【单选题】为了保证结构安全可靠性,尽可能提高钢材的屈服比,下列合理的屈服比是( )
【多选题】根据《消费者权益保护法》规定,经营者以预收款方式提供商品或者服务的,未按约定提供的( )。
【单选题】Which of the following statements characterize an oligopoly market?
A.
Oligopoly firms are guaranteed profits due to the lack of competition.
B.
Firms are aware that their own economic behavior will influence the decisions of rivals.
C.
There are few barriers to entry.
D.
Firms choose price and output independently from the decisions made by competitors.
【单选题】为了保证结构安全可靠性,尽可能提高钢材的屈服比,系列合理的屈服比是( )
【多选题】根据《消费者权益保护法》规定,经营者以预收款方式提供商品或者服务的,未按约定提供的( )。
【单选题】In an oligopoly:
A.
there are many sellers.
B.
there are no barriers to entry.
C.
firms recognize their interdependence.
D.
total surplus is maximized.
【多选题】根据《消费者权益保护法》规定,经营者以预收款方式提供商品或者服务的,未按照约定提供的,
【多选题】根据(消费者权益保护法)规定,经营者以预收款方式提供商品或者服务的,按照灼定据供的,( )。