下列事件在阿拉伯半岛的统一过程中起了加速作用的是（    ）

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仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    I am really pleasing that you will come to our school to study Chinese. I think you would face some difficulties in your study because Chinese is not easy to learn. You will also suffer homesickness because of living far away from your country, and there is no need to feel worried. Our classmates are very friendly and easygoing, so it'll be easy for you to get used to the life there. I'll introduce you to my family and friends, and you won't feel alone. Besides, it'll also help me to learn Chinese and Chinese culture. In the word, I'll try my best to make you feel at your home. I'm looking forward to meet you.

测得一块木板的长度为1.985m，可知测量用的刻度尺的最小分度是（  ）