Which of the following bit width of data transmission does PCI local bus support? A: 32b B: 64b C: 128b D: 96b

硬盘使用的外部总线接口标准有__等多种（） A: Bit - BUS 、STF B: IDE、EIDE、SCSI C: EGA、VGA D: RS－232、IEEE 488

In Verilog HDL, which option is the correct interpretation of the following statement? assign bus [7:4] = {bus [0], bus [1], bus[2], bus[3] } ; A: bus[0], bus[1], bus[2] and bus[3] are assigned to bus[4], bus[5], bus[6] and bus[7] respectively B: bus[0], bus[1], bus[2] and bus[3] are assigned to bus[7], bus[6], bus[5] and bus[4] respectively C: The values of bus[0], bus[1], bus[2] and bus[3] remain unchanged D: All the values of bus[0], bus[1], bus[2] and bus[3] become binary 0

18.A) Bus 7.B) Bus 70.C) Bus 17.D) Bus 20. A: Bus 7. B: Bus 70. C: Bus 17. D: Bus 20.

Verilog HDL中，下面语句的正确解释是：（）assign bus [7:4] = {bus [0], bus [1], bus[2], bus[3] } ; A: bus[0]、bus[1]、bus[2]、bus[3]分别赋值给bus[4]、bus[5]、bus[6]、bus[7] B: bus[0]、bus[1]、bus[2]、bus[3]分别赋值给bus[7]、bus[6]、bus[5]、bus[4] C: bus[0]、bus[1]、bus[2]和bus[3]的值保持不变 D: bus[0]、bus[1]、bus[2]和bus[3]的值均变为二进制0

My cousin always _______ to school. A: by bus B: by a bus C: take a bus D: takes a bus

Be careful! ______ ! A: The bus comes here B: Here comes the bus C: The bus here is D: There is the bus

BUS(Bus bar)

They are waiting ___ a bus ___ the bus stop.

写出下列的plc基本逻辑指令的含义：LD bit指令（ ）；LDN bit（ ）；A bit（ ）； AN bit（ ）； O bit（ ） ； ON bit（ ） ； = bit（　　　　　　）