非时序逻辑系统
参考答案：
系统的输出只与输入变量的组合有关，与变量取值的先后顺序无关。
酶标记抗体效价测定最常用的方法是（）
A.棋盘滴定法
B.抗原稀释法
C.抗体稀释法
D.酶标抗体稀释法
E.抗原抗体稀释法
"We will learn English words this year," the teacher said to the students.
A．one thousand three hundred and twenty-one
B．a thousand and three hundred twenty-one
C．one thousand three hundred twenty-one
D．a thousand three hundreds and twenty-one
