A.I am very pleased to have this opportunity to....
B.First let me express my gratitude 
C.Now after a short introduction I would like to read to the main part of my paper...
D.The last part of my report will be devoted to....

A.對論文的各個環(huán)節(jié)如標(biāo)題、論點、論據(jù)、論證過程、結(jié)論等逐一進(jìn)行檢驗
B.對論文的表述形式進(jìn)行檢驗
C.對論文的語言、符號進(jìn)行檢驗
D.對論文的文字、標(biāo)點進(jìn)行檢驗