【单选题】听力原文: On Feb 15th, 1989, an instant survey was carried out among 18 overseas postgraduate students. Eleven students were male and seven were female. The purpose of the survey was to discover the views...
【判断题】两样本率的比较可以采用 2 c 检验,也可以采用双侧 u 检验。
【单选题】以下关于基本型8XX51单片机的中断系统的说法中,不正确的是()。
C.
中断源的名称分别是定时/计数器中断T0、T1、T2,外部中断0、外部中断1,串行口中断。
【单选题】听力原文: On 15 Feb., 1989, an instant survey was carried out among 18 overseas postgraduate students: 11 students were male and 7 were female. The purpose of the survey was to discover the views of the s...
A.
11 male students and 7 female students.
B.
7 male students and 11 female students.
C.
18 male students and 7 female students.
D.
7 male students and 18 female students.