No. 18
A. a. On Thursday.
B. b. On Wednesday.
C. c. On Tuesday.
D. d. On Monday.
No. 19
A. a. Arrange the meeting.
B. b. Write a report.
C. c. Call the man in the afternoon.
D. d. Pass the message.
用两片八选一数据选择器74LS151,可以构成十六选一数据选择器。
A. 对
B. 错
可以用四选一的数据选择器或是用八选一数据选择器实现三变量多数表决电路。
A. 对
B. 错