【判断题】使用台虎钳夹紧工件时,只允许用手的力量扳动台虎钳手柄,不准用锤子敲击或套上管子转动手柄。
【单选题】Which of the following statements is true about potential competitors in an industry?
A.
They threaten the profitability of established companies.
B.
They are usually encouraged by established companies.
C.
They find it easier to enter an industry when the entry barriers are high.
D.
They find it easier to enter an industry when established companies have economies of scale.
E.
They usually have an absolute cost advantage over established companies.
【简答题】An industry which is disappearing is said to be d___________.
【判断题】( )使用台虎钳夹紧工件时,不准用锤子敲击或套上管子转动手柄,以免丝杠、螺母或钳身受力过重而损坏。
【单选题】An industry in which a few firms cater to the entire market is called:
C.
a perfect competition.
【单选题】Which of the following is NOT an entry barrier to an industry?
A.
expected competitor retaliation
C.
customer product loyalty
D.
bargaining power of suppliers
【单选题】An transport industry is an area of commerce in which aircraft are employed to carry passengers, freight and mail.
A.
空中运输业是一种以雇佣飞机来输送乘客,货物和信件的一种商业贸易。
B.
空运业是商业的一个领域,它就是用飞机运送乘客,货物及邮件。
C.
空运业务是贸易领域的一项业务,它可以用飞机来载人,运货物和邮件。
D.
航空运输业是一个商业领域,在这个领域中用飞机运送旅客,货物和邮件。
【判断题】使用台虎钳夹紧工件时,不准用锤子敲击或套上管子转动手柄,以免丝杠、螺母或钳身受力过重而损坏 ( )