把6molA和5molB两气体通入容积为4L的密闭容器中，一定条件下反应：3A（气）+B（气）2C（气）+xD（气）；△H＜0，5min达平衡，此时生成2molC，测得D的平均反应速率为0.1mol·(L·min)^-1。下列说法中正确的是（      ）

增加：在缺词处加一个漏字符号（∧），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：在错的词下划一横线，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限一词；2.只允许修改10处，多者（从第11处起）不计分。

    Last week, I take part in the Cultural Exchange Week. I enjoyed myself in England. I visited the city museum and several place of interest, which made me have better understanding of the English society, culture and history.

    What's more, I was luckily enough to meet my pen friend Tom there. I stayed at his home. And I'll never forget the days when we spent together. When I left England, he offered to me a dictionary for a gift. It's of great help for me to learn English. I will make full use of them and learn English good.

    I hope Tom will come to China when it's convenience for him!

已知命题p：函数f （x）=|cosx|的最小正周期为2π；命题q：函数y=x³+sinx的图象关于原点中心对称，则下列命题是真命题的是（　　）