逻辑项<imgwidth="57"height="29"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj01.files/szlj013770.png">的相邻项是______。
①
<imgwidth="63"height="30"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj01.files/szlj013785.png">
②
<imgwidth="63"height="23"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj01.files/szlj013788.png">
③
<imgwidth="67"height="27"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj01.files/szlj013791.png">
④
<imgwidth="64"height="30"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj01.files/szlj013794.png">