【单选题】【消耗次数：1】
输入序列为ABC，可以变为CBA时，经过的栈操作为（ ）。
①
push,pop,push,pop,push,pop
②
push,push,push,pop,pop,pop
③
push,push,pop,pop,push,pop
④
push,pop,push,push,pop,pop
参考答案：
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【简答题】
执行指令 PUSH AX有 SP =[填空1], 执行指令 POP AX有SP =[填空2]。
【单选题】
He________listen to pop music,but now he________dancing.
①
is used to;used to
②
used to;is used to
③
used to;is used for
④
is used for;used to
【单选题】
18. He ______ listen to pop music, but now he ______dancing.
①
is used to; used to
②
used to; is used to
③
used to; is used for
④
is used for; used to
【单选题】
Pop music is such an important part of society [] it has even influenced our language.
①
as
②
that
③
which
④
where
随机题目