预防性策略就是我方在谈判中处于被动地位时所采取的（）
A、主动策略
B、回避策略
C、保守策略
D、被动策略
参考答案：C
__________，I have to put it away and focus my attention on study this week.
A．However the story is amusing
B．No matter amusing the story is
C．However amusing the story is
D．No matter how the story is amusing
选择好的窗函数对信号进行截断，可以减少能量泄漏。（）
