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举一反三
【单选题】Since American's rank in graduation rate dropped dramatically, ______.
A.
more poor and non-white students cannot enter college
B.
the enrollment rate of white students may increase
C.
the young may be less well educated than their fathers
D.
more money and effort will be put on higher education
【简答题】已知某二进制数(＜20)存在内RAM 50H单元中，阅读下列程序，说明其功能。 MOV R0,#50H ;R0=50H MOV A,@R0 ;A=(50H) RL A ;[A=(50H)]×2 MOV R1,A ;R1=[A=(50H)]×2 RL A ;[A=(50H)]×2×2 RL A ;[A=(50H)]×2×2×...
【单选题】MOV A, R0的指令功能是:
A.
把寄存器R0里面的地址所指的内容取出给累加器A
B.
把寄存器R0的内容取出给累加器A
C.
把寄存器R0里面的地址所指的内容取出并累加至A
D.
把寄存器R0的内容取出并累加至A
【简答题】I know _______________ since graduation.
【单选题】MOV R0,#0x8000 MOV R2,#0x640 STR R2,[R0] MOV R1,#0x000003F0 SWPB R4,R1,[R0] 执行完以上汇编程序后,R4和[R0]的结果是多少
A.
R4=0x40 [R0]=0x06F0
B.
R4=0x3F0 [R0]=0x8000
C.
R4=0x40 [R0]=0x8000
D.
R4=0x3F0 [R0]=0x06F0
【单选题】After graduation, he was employed by a famous company and ____ there ever since.
A.
worked
B.
has worked
C.
had worked
D.
is working
【简答题】已经R0＝8000,R1＝8800,执行指令MOV R0,R1, LSR2后，R0＝___【13】____,R1=___【14】____。
【单选题】Since the Great Depression，the United States government has protected farmers from damaging drops in grain prices．
A.
slight
B.
surprising
C.
sudden
D.
harmful
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