考虑下述文法,S为开始符号 G1[S]:S→A A→aAb | ab G2[S] S→AA→aA |a| 下列结论中为真的是()。
A. G1是LR(0)文法,G2不是LR(1)文法
B. G2是LR(0)文法,G1不是LR(1)文法
C. G2是LR(1)文法,G1不是LR(1)文法
D. G1和G2都是LR(1)文法
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(The greatest utility), of an education lies (not so much) in teaching one information (rather than) in teaching one how to deal with the information (acquired).
A. The greatest utility
B. not so much
C. rather than
D. acquired
The doctor pondered for a while, trying to recall which of several medications would be best to ______ the patient's suffering.
A. alleviate
B. restrict
C. decrease
D. diminish
下列属于纠错码的是()。
A. 循环冗余校验
B. 海明校验
C. 水平奇偶校验
D. 垂直奇偶校验
在下列查找方法中,平均查找长度与元素的个数无关的方法是()。
A. 顺序查找法
B. 折半查找法
C. 散列表查找法
D. 无论哪种查找法