在AT89S52系统中，一个机器周期等于1.5us。
在AT89S52系统中，一个机器周期等于1.5us。
6. Most of us . But do you know that about 1.5 billion people in this world have no access to electrical power.(take......for granted)
6. Most of us . But do you know that about 1.5 billion people in this world have no access to electrical power.(take......for granted)
如果采用9MHz晶振，1个机器周期为（）us A: 1 B: 1.5 C: 2 D: 2.5
如果采用9MHz晶振，1个机器周期为（）us A: 1 B: 1.5 C: 2 D: 2.5
晶振为6MHz,单片机的机器周期是() A: 2uS B: 1.5uS C: 1uS D: 0.5uS
晶振为6MHz,单片机的机器周期是() A: 2uS B: 1.5uS C: 1uS D: 0.5uS
晶振为6MHz,单片机的机器周期是() A: 2uS B: 1.5uS C: 1uS D: 0.5uS
晶振为6MHz,单片机的机器周期是() A: 2uS B: 1.5uS C: 1uS D: 0.5uS
若8051单片机的晶振频率为8MHz，一个机器周期等于（ ）us。 A: 1 B: 1.5 C: 2 D: 0.5
若8051单片机的晶振频率为8MHz，一个机器周期等于（ ）us。 A: 1 B: 1.5 C: 2 D: 0.5
Most of us take electricity __________. But do you know that about 1.5 billion people in this world have no access to electrical power? A: as agreed B: for granted C: as luxury D: for reference
Most of us take electricity __________. But do you know that about 1.5 billion people in this world have no access to electrical power? A: as agreed B: for granted C: as luxury D: for reference
Most of us take electricity for ______. But do you know that about 1.5 billion people in this world have no access to electrical power? ( ) A: sure B: gift C: right D: granted
Most of us take electricity for ______. But do you know that about 1.5 billion people in this world have no access to electrical power? ( ) A: sure B: gift C: right D: granted
在51单片机系统中，若晶振频率6MHz，一个机器周期等于 A: 1us B: 1.5us C: 2us D: 2.5us
在51单片机系统中，若晶振频率6MHz，一个机器周期等于 A: 1us B: 1.5us C: 2us D: 2.5us
假设51单片机的晶振为6MHz，则其对应的机器周期为( )。 A: 0.5us B: 1us C: 1.5us D: 2us
假设51单片机的晶振为6MHz，则其对应的机器周期为( )。 A: 0.5us B: 1us C: 1.5us D: 2us