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【单选题】
If grammar G is unambiguous, then for any sentence α of it ()
A.
The syntax tree corresponding to the leftmost derivation and rightmost derivation must be the same
B.
The syntax tree corresponding to the leftmost derivation and rightmost derivation may be different
C.
The leftmost and rightmost derivations must be the same
D.
There may be two different leftmost derivations, but they correspond to the same syntax tree
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参考答案：
参考解析：
刷刷题刷刷变学霸
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【单选题】“ebay”在线纠纷解决中心的设计理念不包括下列哪项()
A.
效率优先,兼顾公平
B.
自主解决纠纷
C.
倾向于保护经营者
D.
充分利用互联网技术,提供个性化纠纷解决方案
【单选题】Grammar can be divided into four types: Type 0, type 1, type 2 and type 3. The 0-type grammar is ().
A.
Phrasal grammar
B.
Regular grammar
C.
Context -sensitive grammar
D.
Context -free grammar
【多选题】下面描述中最适合DTFT的是( )。
A.
时域为离散序列，频域也为离散序列
B.
时域为离散有限长序列，频域也为离散有限长序列
C.
时域为离散无限长序列，频域为连续信号
D.
时域为离散无限长序列，频域为周期信号
【单选题】To change a line in the code, make it work for linear interpolation of damped oscillation f(x)=-k*x-b*v
A.
line 2
B.
line 9
C.
line 17
D.
line 21
【单选题】Grammar can be divided into four types: Type 0, type 1, type 2 and type 3. The type 2 grammar is ( ).
A.
Phrasal grammar
B.
Regular grammar
C.
Context-sensitive grammar
D.
Context-free grammar