【简答题】Base on the following operator precedence grammar G[S]: S→a|^|(T) T→T,S|S Calculate the operator higher precedence than (.>), the operator lower precedence than (<.) and the operator same precedence o...
【简答题】Base on the following operator precedence grammar G[S]: S→a|^|(T) T→T,S|S Construct the operator precedence matrix.
【简答题】Base on the following operator precedence grammar G[S]: S→a|^|(T) T→T,S|S Calculate the all nonterminals FIRSTVT sets and the LASTVT sets.
【多选题】GSM系统采用BT=0.3、调制速率为270.833kbit/s的高斯最小移频键控调制方式。这种调制方式具有的特点包括()。
【多选题】下列关于GSM系统的重要特点叙述正确的有( )。
【单选题】三相半波相控整流电路,当触发角=0º时,输出的负载电压平均值为( )。
【判断题】An operator grammar is one in which there are no productions containing consecutive non-terminal symbols. In such a grammar, no sentential form contains consecutive non-terminals (simple to prove this...
【简答题】CDMA系统具有哪几个特点?它比GSM系统有哪几个突出的优点?
【单选题】Which of the following operator precedence is correct?