成本较低,进入潜在市场有困难而导致风险较高的产品或服务被称为是()
A、策略型产品或服务
B、杠杆型产品或服务
C、关键型产品或服务
D、战略型产品或服务
参考答案:C
Had it been possible I would have gone to the movies but I________ busy. [ ]
A. had been
B. am
C. was
D. would be
由六个十万、八个百组成的数是60800.______.(判断对错)