输入序列为ABC，可以变为CBA时，经过的栈操作为: push,pop,push,pop,push,pop|push,pop,push,push,pop,pop|push,push,pop,pop,push,pop|push,push,push,pop,pop,pop

输入序列为abc,若输出序列为bca,经过的栈操作为( ) A: push,pop,push,pop,push,pop B: push,push,push,pop,pop,pop C: push,push,pop,push,pop,pop D: push,pop,push,push,pop,pop

Precision marketing is actually making full use of various ______to push the marketing information to more accurate users, so as to save the marketing cost and maximize the marketing effect. A: traditional media B: the new media

设有一个空栈，现有输入序列1，2，3，4，5，经过push，push，pop，push，pop，push，push后，输出序列是_________

设有一个空栈，现有输入序列为1，2，3，4，5，经过PUSH，PUSH，POP，PUSH，POP，PUSH，PUSH后，输出序列是 。

Fixed Cost，Veriable Cost，Explicit Cost，Implicit Cost，Opportunity Cost，Sunk Cost，Economic Profit，Normal Profit，Average Cost，Margial Cost

设有一空栈，现有输入序列（1，2，3，4，5），经过push, push, pop, push, pop, push, push, pop, pop, pop后，输出序列是

在空的顺序栈中，依次执行操作：push(a); push(b); pop(); push(x); push(y); pop(); push(z)。栈顶元素是： 。

Which of the following about technology is implied rather than directly stated in the passage A: Digital technology is being used to push advertising messages on high-definition video screens. B: Thanks to new technologies, advertisers have easier access to potential consumers. C: Wireless technology ran push advertising anywhere one wants. D: Technology advances may cut the cost of installing screens.

PUSH业务根据承载方式不同可以分为在线PUSH和离线PUSH。