请判断此话有无语法错误London has the newest railway sustem,and was only opened in the year2001.是不是 and was 中间应该加it?

请判断此话有无语法错误London has the newest railway sustem,and was only opened in the year2001.是不是 and was 中间应该加it? 帮忙检查下有无语法错误 I AM UNDERSTAND 有无语法错误 请判断我的句子是否正确,有无语法错误.Any schools without rules will manage students with difficuity.任何一个学校没有规矩是难以管好学生的.如果有语法错误,请指出；并帮我更正,意思就是上面这句话. Regular review leads to improved performance on tests.有无语法错误?to 后不是加动词原形吗是怎判断这种情况就是形容词词性而不是语法错误 判断句子有无语法错误Neither of the answers is right.错的话怎么改?…为什么不是are right呢？ 英语语法错误,请大虾们看看,On that day,we use little starts and bright lights to decorate Christmas tree.请问这句话有无语法错误, 请翻译area(ha) 请问这句话有无语法错误Can you imagine what a scary thing it is!若有,请告知! Things are bout to change 有无语法错误 have much time to study 有无语法错误? We always learn together.有无语法错误 有无语法错误Duncan is a special family. 判断句子有无语法错误.As the first grade students which has only stayed here for about one year,your graceful,has always been impressive to us. 判断此话的对错（图中红色字体）,理由? “天朝物产丰盛,无所不有,原不籍外夷货物以通有无.”此话反映出乾隆皇帝怎样的思想? 强酸强碱或者弱酸弱碱的判断1,测0.01mol /L HA溶液的PH,结论：PH=2 HA为强酸,PH大于2 HA为弱酸.为什么是这样?为什么以2为界限?2,测NaA溶液的PH,结论：PH=7 HA为强酸,PH大于7,HA为弱酸,同样请解释下,为 如何判断有无化学键断裂?