2016年11月17日，国际社会保障协会在巴拿马举行了第32届全球大会，将“社会保障杰出成就奖”（2014-2016）授予中华人民共和国政府。对此，以下说法正确的是（    ）

一个七位数，它的各个数位上的数都不相同，且和为36，这个七位数最大是多少？最小是多少？

连续抛掷两颗骰子，设第一颗向上点数为m，第二颗向上点数为n．

（Ⅰ）求m﹣n=3的概率；

（Ⅱ）求m•n为偶数，且|m﹣n|＜3的概率．

中国首台自行设计、自主集成研制的深海潜水器“蛟龙号”“探触”5000米深海 时“蛟龙号”有望再度刷新中国载人深潜的深度记录。当“蛟龙号”浸没在海水后继续下潜的过程中，下列说法正确的是    (    )

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下短文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1） 每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    With the improvement of people's living standards, more and more people possess their own car. Some thought it is good to own a car. First, it's an convenient, fast and comfortable means of transportation, that saves people much time on the trip. It also makes businesses and industries to develop faster.

    However, others have different opinions, thinking that cars give waste gases and pollute the environment around. Have too many cars will have some bad effects, such as more accidents and crowdedness. Besides, lacking parking lots are another big problem.

    As far as I'm concerned, we ought to think careful before buying cars. Even if we have cars, we should use it less.