S4=a1(1-q4)1-q=a1[1-(23)4]1-23=65
∴a1=27
故答案为27
根据所提供的句子意思,将所给单词的正确形式填空,使句子意思完整。并在答题卡上将答案填写在对应题号的横线上。
小题1:I think MoYan is a great (write).
小题2:An elephant is one of the ______ (big) animals in the world.
小题3:Father’s Day is on the (three) Sunday in June each year.
小题4:They decided (work) hard from now on.
小题5:We are excited about the (excite) news.
小题6:Look!There (be) a lovely bird singing in the tree.
小题7:We should (help)the people who are in trouble in Ya’an .
小题8: (luck), all the people were saved in the accident.
小题9:The girl is very clever. She learns English by (her).
小题10:Would you mind (open) the windows? It’s too hot.
群众监督的形式和特点?