【判断题】298K时要使下列电池成为自发电池,Pt|Cl 2 (g, p 2 )|Cl - |Cl 2 (g, p 1 )|Pt,则必须使p 2 > p 1 。
【单选题】若8255的B口与1位共阴极的LED数码管的连接如下图所示,现从B口输出的值是4FH,请问LED数码管上显示的内容是 。【图片】
【单选题】You must write a sales letter to prospective customers. What should you do in the opening of your sales letter? ( )
A.
Offer something valuable, promise a benefit to the reader, or use some other technique to gain your reader's attention.
B.
Convince your reader of the superiority of the product or service being solD.
C.
Motivate your reader to take action.
D.
Promise an incentive for responding by a specific date.
【简答题】1 2 3 4 5 6 LOAD R0,A k IF ID LS WR ADD R1,R0 k+1 IF ID FA FA WR STORE R1,B k+2 IF ID ST WR ADD R2,R3 k+3 IF ID FA FA WR MUL R3,R4 k+4 IF ID MD MD MD WR OR R5,R6 k+5 IF ID OR WR ADD R5,R7 k+6 ...
【单选题】由两个并发执行的进程P1和P2,共享初值为1的变量x。P1对x加1,P2对x减1。加1和减1操作的指令序列分别如下 //加1操作 Load R1,1 1//取x到寄存器R1中 Inc R1 2 Store x,R1 3将R1的内容存入x //减1操作 Load R2,1 4//取x到寄存器R2中 Dec R2 5 Store x,R2 6将R2的内容存入x 两个操作完成后,x的值为( )
【单选题】298K时要使下列电池成为自发电池,Pt|Cl 2 (g, p 2 )|Cl - |Cl 2 (g, p 1 )|Pt,则必须使两个压力的关系为: