题目内容
若 B 为非终结符，则 A → a · B β为 ____ 项目。
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若项目集 Ik 含有 A → a ·，则在状态 K 时，无论面临什么输入符号都采取“ A →α归约”的动作一定是。
A soldier who runs through gunfire to rescue other military personnel is seen as a hero. So are larger-than-life leaders such as Nelson Mandela, who emerged after 27 years of jail, confined in a solitary chamber.
In Toronto, Canada, downtown life stopped when more than 11,000 police and other emergency responders marched solemnly through the streets to honor policeman, Sergeant Ryan Russell, a 35-year-old “good man and good cop”, who believed deeply in his commitment to protect and serve.
你可以按压伤口让血流的慢些。apply pressure on
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