【多选题】电平触发器的动作特点是( )
A.
只有CLK为有效电平时,触发器将按照输入信号置成相应的状态。
B.
在CLK=1的全部时间里,S和R的变化都将引起输出状态的变化。
C.
在 CLK=1 的全部时间里, 若S和R的状态多次发生变化,那么触发器的状态也会发生多次翻转。
【单选题】May I speak to Jack?
【单选题】May I speak to Jack?
B.
Sorry, he's not available right now.
【单选题】—May I speak to Jack? —Sorry, be _____ Macao and he will be back in three days. [ ]
【单选题】We've had a good start, but next, more work needs ________ to achieve the final success. [ ]
【单选题】播种一种观念就收获一种行为,播种一种行为就收获一种习惯,播种一种习惯就收获一种命运。要改变命运,就要先改变行为;要改变行为,就要先改变思想、解放思想。这是因为( )
【单选题】播种一种观念就收获一种行为,播种一种行为就收获一种习惯,播种一种习惯就收获一种命运。要改变命运,就要先改变行为,要改变行为,先要改变思想、解放思想。这是因为()
【单选题】—The party is a great success. We've had a good time. —______!
【简答题】We've had a good start, but next, more work needs___ _____ (do) to achieve the final success.
【单选题】播种一种观念就收获一种行为,播种一种行为就收获一种习惯,播种一种习惯就收获一种命运。要改变命运,就要先改变行为;要改变行为,先要改变思想,解放思想。这是因为()