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【单选题】
按来源不同，原始凭证可分为( )。A.
外来原始凭证和自制原始凭证
B.
一次性原始凭证、累计原始凭证和汇总原始凭证
C.
收付业务凭证和转账业务凭证
D.
专用凭证和通用凭证
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【单选题】—What would I do if I can't sleep before a big exam? —You'd better a long walk before going to bed. [ ]
A.
take
B.
taking
C.
to take
【单选题】--- What did you mention you’d been accustomed to? ---______ to soft music before going to bed.
A.
To listen
B.
Listen
C.
Listening
D.
Listens
【简答题】设（R0）=20H，（R1）=30H，（20H）=20H，（21H）=30H，（22H）=40H，（30H）=E0H，（31H）=50H，（32H）=60H。 CLR C MOV R2, #3LOOP: MOV A, @R0 ADDC A, @R1 MOV @R0, A INC R0 INC R1 DJNZ R2, LOOP SJMP $程序执行后，（R0）= 。注意：答案用十六进制...
【简答题】设(A)=0FH ,(R0)=30H,内部RAM(30H)=0AH,(31H)=0BH,(32H)=0CH 请写出在执行各条列指令后,所示单元的内容: MOV A, @R0 ;(A)=( ) MOV @R0, 32H;(30H)=( ) MOV 32H, A;(32H)=( ) MOV R0, #31H;(R0)=( ) MOV A, @R0;(A)=...
【单选题】Suppose you read part of a book before going to bed last night. Now you want to use just one sentence to describe this action. Which of the following sentences serves your purpose the best?
A.
I read a book last night.
B.
I did some reading last night.
C.
I tried to read a book last night.
D.
I was reading a book last night.
【单选题】（R0）=30H，（30H）=31H，执行指令：MOV A，@R0后（ ）
A.
（A）=31H
B.
（A）=30H
C.
（A）=(R0)=30H
D.
（A）=(R0)=31H,(30H)=0
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