A、wants
B、were wanting
C、want
D、have wanted
第1题:
— Which of these two hotels do you like?— Neither.()
第2题:
A. either
B. every
C. both
D. neither
第3题:
若51单片机使用频率为6MHz的晶振,则振荡周期为:,机器周期为:,指令周期为:
A.1/6us,2us,不定
B.1/12us,2us,1/3us
C.1/6us,1us,不定
D.1/12us,1us,1/3us
第4题:
A.none
B.any
C.some
D.neither
第5题:
[A] tolerate
[B] sustain
[C] experience
[D] undertake
第6题:
SysTick系统定时器延时1s的写法可以是()
A.Delay_us(1000000);
B.Delay_us(500000); Delay_us(500000);
C.Delay_us(400000); Delay_us(500000); Delay_us(100000);
D.Delay_us(1000000); Delay_us(1000000);