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两插座的左接 ,右接 ,三插座的左接 , 右接 ,上接
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【单选题】听力原文：M: Have you found anything wrong with my stomach? W: I am still examining, I will let you know the result next week. Q: What is the most probable relationship between the two speakers? (14)
A.
Father and his daughter.
B.
Doctor and patient.
C.
Wife and husband.
D.
Student and teacher.
【单选题】听力原文：W: Have you found anything wrong with my stomach? M: Not yet. I am still examining. I'll let you know the result next week. Q: What is the probable relationship between the man and the woman? (14...
A.
Husband and wife.
B.
Father and daughter.
C.
Doctor and patient.
D.
Teacher and student.
【简答题】MCS-51单片机采用12MHZ晶振时,它的机器周期(____),ALE引脚正脉冲频率为(____)。
【单选题】听力原文：W: Have you found anything wrong witi my stomach? M: Not now. I'm still examining. I'll let you know the result next week. What's the possible relationship between the two speakers?
A.
Doctor and patient.
B.
Husband and wife.
C.
Teacher and student.
D.
Father and daughter.
【简答题】MCS-51 单片机采用12MHz晶振时,ALE引脚正脉冲频率为 ___ _ _______ MHz ,定时器的定时脉冲是_ _ __us。
【简答题】若MCS-51单片机采用12MHz的晶振,机器周期为( )。
【单选题】听力原文：W: Have you found anything wrong with my stomach? M: Not yet. I am still examining. I'll let you know the result next week. What is the probable relationship between the man and the woman?
A.
Husband and wife.
B.
Father and daughter.
C.
Doctor and patient.
D.
Teacher and student.
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