【单选题】
下列各函数等式中无冒险现象的函数式有______。
①
<imgwidth="104"height="29"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj055399.png">
②
<imgwidth="130"height="25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj055425.png">
③
<imgwidth="165"height="25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj055451.png">
④
<imgwidth="165"height="25"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj05.files/szlj055476.png">
【单选题】
下列电路中,实现逻辑功能<imgwidth="70"height="30"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026736.png">的是______。
①
<imgwidth="289"height="155"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026749.png">
②
<imgwidth="287"height="155"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026752.png">
③
<imgwidth="304"height="134"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026755.png">
④
<imgwidth="282"height="135"src="http://wljy.whut.edu.cn:80/uploadfiles/word/szlj02.files/szlj026758.png">