单项选择题

In 2001, the United States was in recession. Which of the following things would you expect not to have happened?

A． increased layoffs and firings
B． a higher rate of bankruptcy
C． increased claims for unemployment insurance
D． increased investment spending

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单项选择题

在基于两段锁协议的调度中，事务在扩展阶段可以（）
A、申请锁
B、释放锁
C、申请和释放锁
D、不受封锁兼容性约束

提价会引起消费者、经销商和企业推销人员的不满，因此提价不仅不会使企业的利润增加，反而导致利润的下降。（）
正确
错误

答案：错误