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【单选题】
执行如下3条指令后,A=( ),30H=( )? MOV A,#55H; MOV R0,#30H; MOV @R0,AA.
55H, 30H
B.
30H, 55H
C.
55H, 55H
D.
30H , 30H
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举一反三
【简答题】信息是经过加工处理并对人类社会实践和生产活动产生决策影响的 。
【单选题】What is the implication of the words on the bus wall?
A.
All small acts will add up to kindness.
B.
It's a small act to help a person in need.
C.
Everyone can play his own part to make things better.
D.
You should be kind to your neighbors and they will treat you the same way.
【单选题】Judging from the context, 'Practice random kindness and senseless acts of beauty.' (line 2, para. 2) means______.
A.
do some unplanned good deeds
B.
appreciate kind acts and anything beautiful
C.
offer your kindness to some people in particular
D.
be aware of others' kind-heartedness
【简答题】用戴维南定理求解 电路,已知 U S =12V, R 1 =8Ω, R 2 =2Ω, R 3 =6Ω , R 4 =3Ω ,Is=3A,求 R 4 上的电压 U 的值 为( )V。
【简答题】已知电路如图a所示，U S =8V，R 1 =R 2 =R 3 =2Ω，R 4 =1Ω，试用戴维南定理求解R 4 中电流I。
【简答题】已知电路如图a所示，U S1 =9V，R 1 =3Ω，R 2 =6Ω，R 3 =4Ω，试用戴维南定理求解I。
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