①一双红色的小爪子紧紧地抓住苇秆。

②它一动不动地注视着泛着微波的水面。

在经济增长滞缓、经济运行主要受需求不足制约时，政府可以采取扩张性财政政策，通过增加经济建设支出，减少税收，刺激总需求增长，降低失业率，拉动经济增长。这突出体现了财政具有促进_______作用。（  ）

在程序框图中，任意输入一次$x\left(0\le x\le 1\right)$与$y\left(0\le x\le 1\right)$，则能输出数对(x,y)的概率为      (    )

    Are you able to send a letter with pictures and sounds to someone somewhere in the world without a stamp(邮票) on it? Using a computer you can send e-mails quickly and easily. The post is much slower than e-mail. E-mail can send its message to the other side of the world in seconds.

    E-mail is easy to use and it saves time and money. The differences in time in different parts of the world do not matter when sending e-mail. It's twenty-four-hour service(服务) that you can send e-mail at any time of the day or night. No one has to be there to get e-mail. It does not matter if your friends are in beds when you send e-mail to them, or you are seeing a movie at the movie theater when they send e-mail back.