【简答题】PARTⅠDICTATION [15 MIN] Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understa...
【单选题】(Single choice) 6. A pulse is applied to each input of a 2-input NOR gate. One pulse goes HIGH at t = 0 and goes back LOW at t = 1 ms. The other pulse goes HIGH at t = 0.8 ms and goes back LOW at t = ...
A.
It goes LOW at t = 0 and back HIGH at t = 3 ms.
B.
It goes LOW at t = 0.8 ms and back HIGH at t = 3 ms.
C.
It goes LOW at t = 0.8 ms and back HIGH at t = 1 ms.
D.
It goes HIGH at t = 0.8 ms and back LOW at t = 1 ms.
【单选题】(Single choice) 7. A pulse is applied to each input of an exclusive-OR gate. One pulse goes HIGH at t = 0 and goes back LOW at t = 1 ms. The other pulse goes HIGH at t = 0.8 ms and goes back LOW at t ...
A.
It goes HIGH at t = 0 and back LOW at t = 3 ms.
B.
It goes HIGH at t = 0 and back LOW at t = 0.8 ms.
C.
It goes HIGH at t = 1 ms and back LOW at t = 3 ms.