圆形的操场的一周全长是1800米．如果沿着这一圈每隔12米安装一盏灯，一共需要装几盏灯？

日本明治维新内容中，加强中央集权的措施是 （   ）                        

与上文衔接最好的一项是 (    )
菲尔丁说：“不好的书也像不好的朋友一样，可能会把你戕害。”这话没错。但也不必为此走向另一极端，夸大书籍对人的品格的影响。更多的情况是：                 。

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作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

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）每处错误及其修改仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    Though English is a hard subject, but I like my English teacher a lot, and so are my classmates. She is nice to us and always tells us stories of the days when she was in her twenty. Sometimes she even stayed in school to help students make up for their lessons. She always encourages us and tells us do our best. We are gratefully to her, so one day we bought him a cake and a gift. We also made a big card for her, on it we wrote all our names. Seeing these, she was moving and had a big smile in her face.