面对法西斯的疯狂侵略，正义的力量浴血奋战，终于在1943年看到了胜利的希望。这一论断与下面哪一战役有关（    ）

①表明我国在国际上已处于主导地位

②有利于提高我国对外开放的水平

③可以消除我国与其他国家之间的一切矛盾

④是我国综合国力不断增强的具体表现

    An old porter (搬运工人) had worked for the railway for a very long time. One morning he was standing in one of the big railway stations and waiting for travelers to ask him to help them with their luggage, when he saw a small man running toward the trains with a big bag in his hand.

    The porter watched the man for a few seconds, and the man saw the porter.

At once the small man ran up the porter and said, "Can I catch the 10：35 train to London, porter?" He was breathing very fast, and he seemed worried.

    The old porter looked at him for a moment and then said with a smile, "Well, sir, I'd like to help you, but I can't answer your question because I don't know how fast you can run along rails. You see," he explained, "the 10: 35 train to London left five minutes ago."

直线$y=kx+b$与曲线$y=x^3+ax+1$相切于点（2,3），则b的值为（   ）